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Finding the Fourth Proportional to 15,985.60, 23,989.20 and 10,425.40

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Solution

The fourth proportional to 15,985.60, 23,989.20 and 10,425.40 is: 15,645.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,985.60 : 23,989.20 = 10,425.40 : x
  2. Step 2: Convert to fraction form
    15,985.60/23,989.20 = 10,425.40/x
  3. Step 3: Cross multiply
    15,985.60x = 23,989.20 × 10,425.40
  4. Step 4: Simplify right side
    15,985.60x = 250,097,005.68
  5. Step 5: Solve for x
    x = 250,097,005.68/15,985.60
  6. Step 6: Final answer
    x = 15,645.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.