Home / 21,915.19-30,235.57-12,477.07

Finding the Fourth Proportional to 21,915.19, 30,235.57 and 12,477.07

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Solution

The fourth proportional to 21,915.19, 30,235.57 and 12,477.07 is: 17,214.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.19 : 30,235.57 = 12,477.07 : x
  2. Step 2: Convert to fraction form
    21,915.19/30,235.57 = 12,477.07/x
  3. Step 3: Cross multiply
    21,915.19x = 30,235.57 × 12,477.07
  4. Step 4: Simplify right side
    21,915.19x = 377,251,323.38
  5. Step 5: Solve for x
    x = 377,251,323.38/21,915.19
  6. Step 6: Final answer
    x = 17,214.15

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.