Home / 14,987.28-20,681.28-8,700.12

Finding the Fourth Proportional to 14,987.28, 20,681.28 and 8,700.12

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Solution

The fourth proportional to 14,987.28, 20,681.28 and 8,700.12 is: 12,005.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.28 : 20,681.28 = 8,700.12 : x
  2. Step 2: Convert to fraction form
    14,987.28/20,681.28 = 8,700.12/x
  3. Step 3: Cross multiply
    14,987.28x = 20,681.28 × 8,700.12
  4. Step 4: Simplify right side
    14,987.28x = 179,929,617.75
  5. Step 5: Solve for x
    x = 179,929,617.75/14,987.28
  6. Step 6: Final answer
    x = 12,005.49

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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.