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Finding the Fourth Proportional to 16,689.60, 25,000.80 and 10,430.40

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Solution

The fourth proportional to 16,689.60, 25,000.80 and 10,430.40 is: 15,624.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,689.60 : 25,000.80 = 10,430.40 : x
  2. Step 2: Convert to fraction form
    16,689.60/25,000.80 = 10,430.40/x
  3. Step 3: Cross multiply
    16,689.60x = 25,000.80 × 10,430.40
  4. Step 4: Simplify right side
    16,689.60x = 260,768,344.32
  5. Step 5: Solve for x
    x = 260,768,344.32/16,689.60
  6. Step 6: Final answer
    x = 15,624.60

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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.