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Finding the Fourth Proportional to 28,207.60, 42,311.40 and 19,337.20

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Solution

The fourth proportional to 28,207.60, 42,311.40 and 19,337.20 is: 29,005.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,207.60 : 42,311.40 = 19,337.20 : x
  2. Step 2: Convert to fraction form
    28,207.60/42,311.40 = 19,337.20/x
  3. Step 3: Cross multiply
    28,207.60x = 42,311.40 × 19,337.20
  4. Step 4: Simplify right side
    28,207.60x = 818,184,004.08
  5. Step 5: Solve for x
    x = 818,184,004.08/28,207.60
  6. Step 6: Final answer
    x = 29,005.80

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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.