Home / 31,440.18-43,357.78-20,666.02

Finding the Fourth Proportional to 31,440.18, 43,357.78 and 20,666.02

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Solution

The fourth proportional to 31,440.18, 43,357.78 and 20,666.02 is: 28,499.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,440.18 : 43,357.78 = 20,666.02 : x
  2. Step 2: Convert to fraction form
    31,440.18/43,357.78 = 20,666.02/x
  3. Step 3: Cross multiply
    31,440.18x = 43,357.78 × 20,666.02
  4. Step 4: Simplify right side
    31,440.18x = 896,032,748.64
  5. Step 5: Solve for x
    x = 896,032,748.64/31,440.18
  6. Step 6: Final answer
    x = 28,499.61

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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.