Home / 12,915.84-19,372.14-5,117.16

Finding the Fourth Proportional to 12,915.84, 19,372.14 and 5,117.16

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Solution

The fourth proportional to 12,915.84, 19,372.14 and 5,117.16 is: 7,675.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.84 : 19,372.14 = 5,117.16 : x
  2. Step 2: Convert to fraction form
    12,915.84/19,372.14 = 5,117.16/x
  3. Step 3: Cross multiply
    12,915.84x = 19,372.14 × 5,117.16
  4. Step 4: Simplify right side
    12,915.84x = 99,130,339.92
  5. Step 5: Solve for x
    x = 99,130,339.92/12,915.84
  6. Step 6: Final answer
    x = 7,675.10

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.