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Finding the Fourth Proportional to 15,988.92, 22,065.36 and 8,915.16

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Solution

The fourth proportional to 15,988.92, 22,065.36 and 8,915.16 is: 12,303.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,988.92 : 22,065.36 = 8,915.16 : x
  2. Step 2: Convert to fraction form
    15,988.92/22,065.36 = 8,915.16/x
  3. Step 3: Cross multiply
    15,988.92x = 22,065.36 × 8,915.16
  4. Step 4: Simplify right side
    15,988.92x = 196,716,214.86
  5. Step 5: Solve for x
    x = 196,716,214.86/15,988.92
  6. Step 6: Final answer
    x = 12,303.28

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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.