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Finding the Fourth Proportional to 40,391.64, 60,590.80 and 12,311.93

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Solution

The fourth proportional to 40,391.64, 60,590.80 and 12,311.93 is: 18,468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,391.64 : 60,590.80 = 12,311.93 : x
  2. Step 2: Convert to fraction form
    40,391.64/60,590.80 = 12,311.93/x
  3. Step 3: Cross multiply
    40,391.64x = 60,590.80 × 12,311.93
  4. Step 4: Simplify right side
    40,391.64x = 745,989,688.24
  5. Step 5: Solve for x
    x = 745,989,688.24/40,391.64
  6. Step 6: Final answer
    x = 18,468.91

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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.