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Finding the Fourth Proportional to 28,934.60, 43,401.90 and 21,158.60

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Solution

The fourth proportional to 28,934.60, 43,401.90 and 21,158.60 is: 31,737.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,934.60 : 43,401.90 = 21,158.60 : x
  2. Step 2: Convert to fraction form
    28,934.60/43,401.90 = 21,158.60/x
  3. Step 3: Cross multiply
    28,934.60x = 43,401.90 × 21,158.60
  4. Step 4: Simplify right side
    28,934.60x = 918,323,441.34
  5. Step 5: Solve for x
    x = 918,323,441.34/28,934.60
  6. Step 6: Final answer
    x = 31,737.90

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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.