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Finding the Fourth Proportional to 10,869.60, 15,002.88 and 10,130.88

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Solution

The fourth proportional to 10,869.60, 15,002.88 and 10,130.88 is: 13,983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,869.60 : 15,002.88 = 10,130.88 : x
  2. Step 2: Convert to fraction form
    10,869.60/15,002.88 = 10,130.88/x
  3. Step 3: Cross multiply
    10,869.60x = 15,002.88 × 10,130.88
  4. Step 4: Simplify right side
    10,869.60x = 151,992,376.93
  5. Step 5: Solve for x
    x = 151,992,376.93/10,869.60
  6. Step 6: Final answer
    x = 13,983.25

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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.