Home / 19,781.15-29,471.94-18,840.74

Finding the Fourth Proportional to 19,781.15, 29,471.94 and 18,840.74

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Solution

The fourth proportional to 19,781.15, 29,471.94 and 18,840.74 is: 28,070.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.15 : 29,471.94 = 18,840.74 : x
  2. Step 2: Convert to fraction form
    19,781.15/29,471.94 = 18,840.74/x
  3. Step 3: Cross multiply
    19,781.15x = 29,471.94 × 18,840.74
  4. Step 4: Simplify right side
    19,781.15x = 555,273,011.48
  5. Step 5: Solve for x
    x = 555,273,011.48/19,781.15
  6. Step 6: Final answer
    x = 28,070.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.