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Finding the Fourth Proportional to 15,157.60, 20,855.28 and 14,807.68

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Solution

The fourth proportional to 15,157.60, 20,855.28 and 14,807.68 is: 20,373.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.60 : 20,855.28 = 14,807.68 : x
  2. Step 2: Convert to fraction form
    15,157.60/20,855.28 = 14,807.68/x
  3. Step 3: Cross multiply
    15,157.60x = 20,855.28 × 14,807.68
  4. Step 4: Simplify right side
    15,157.60x = 308,818,312.55
  5. Step 5: Solve for x
    x = 308,818,312.55/15,157.60
  6. Step 6: Final answer
    x = 20,373.83

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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.