Home / 31,812.08-43,902.64-18,385.76

Finding the Fourth Proportional to 31,812.08, 43,902.64 and 18,385.76

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Solution

The fourth proportional to 31,812.08, 43,902.64 and 18,385.76 is: 25,373.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,812.08 : 43,902.64 = 18,385.76 : x
  2. Step 2: Convert to fraction form
    31,812.08/43,902.64 = 18,385.76/x
  3. Step 3: Cross multiply
    31,812.08x = 43,902.64 × 18,385.76
  4. Step 4: Simplify right side
    31,812.08x = 807,183,402.41
  5. Step 5: Solve for x
    x = 807,183,402.41/31,812.08
  6. Step 6: Final answer
    x = 25,373.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.