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Finding the Fourth Proportional to 13,432.60, 20,148.90 and 10,970.20

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Solution

The fourth proportional to 13,432.60, 20,148.90 and 10,970.20 is: 16,455.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.60 : 20,148.90 = 10,970.20 : x
  2. Step 2: Convert to fraction form
    13,432.60/20,148.90 = 10,970.20/x
  3. Step 3: Cross multiply
    13,432.60x = 20,148.90 × 10,970.20
  4. Step 4: Simplify right side
    13,432.60x = 221,037,462.78
  5. Step 5: Solve for x
    x = 221,037,462.78/13,432.60
  6. Step 6: Final answer
    x = 16,455.30

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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.