Home / 15,438.30-21,304.86-8,364.69

Finding the Fourth Proportional to 15,438.30, 21,304.86 and 8,364.69

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Solution

The fourth proportional to 15,438.30, 21,304.86 and 8,364.69 is: 11,543.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.30 : 21,304.86 = 8,364.69 : x
  2. Step 2: Convert to fraction form
    15,438.30/21,304.86 = 8,364.69/x
  3. Step 3: Cross multiply
    15,438.30x = 21,304.86 × 8,364.69
  4. Step 4: Simplify right side
    15,438.30x = 178,208,549.39
  5. Step 5: Solve for x
    x = 178,208,549.39/15,438.30
  6. Step 6: Final answer
    x = 11,543.28

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Double scale
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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.