Home / 20,962.17-28,915.14-12,897.19

Finding the Fourth Proportional to 20,962.17, 28,915.14 and 12,897.19

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Solution

The fourth proportional to 20,962.17, 28,915.14 and 12,897.19 is: 17,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.17 : 28,915.14 = 12,897.19 : x
  2. Step 2: Convert to fraction form
    20,962.17/28,915.14 = 12,897.19/x
  3. Step 3: Cross multiply
    20,962.17x = 28,915.14 × 12,897.19
  4. Step 4: Simplify right side
    20,962.17x = 372,924,054.46
  5. Step 5: Solve for x
    x = 372,924,054.46/20,962.17
  6. Step 6: Final answer
    x = 17,790.34

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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.