Home / 39,719.95-54,813.86-21,815.17

Finding the Fourth Proportional to 39,719.95, 54,813.86 and 21,815.17

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Solution

The fourth proportional to 39,719.95, 54,813.86 and 21,815.17 is: 30,105.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.95 : 54,813.86 = 21,815.17 : x
  2. Step 2: Convert to fraction form
    39,719.95/54,813.86 = 21,815.17/x
  3. Step 3: Cross multiply
    39,719.95x = 54,813.86 × 21,815.17
  4. Step 4: Simplify right side
    39,719.95x = 1,195,773,565.18
  5. Step 5: Solve for x
    x = 1,195,773,565.18/39,719.95
  6. Step 6: Final answer
    x = 30,105.11

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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.