Home / 31,017.95-42,781.85-19,677.66

Finding the Fourth Proportional to 31,017.95, 42,781.85 and 19,677.66

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Solution

The fourth proportional to 31,017.95, 42,781.85 and 19,677.66 is: 27,140.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,017.95 : 42,781.85 = 19,677.66 : x
  2. Step 2: Convert to fraction form
    31,017.95/42,781.85 = 19,677.66/x
  3. Step 3: Cross multiply
    31,017.95x = 42,781.85 × 19,677.66
  4. Step 4: Simplify right side
    31,017.95x = 841,846,600.08
  5. Step 5: Solve for x
    x = 841,846,600.08/31,017.95
  6. Step 6: Final answer
    x = 27,140.63

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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.