Home / 39,761.81-54,870.07-21,856.76

Finding the Fourth Proportional to 39,761.81, 54,870.07 and 21,856.76

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Solution

The fourth proportional to 39,761.81, 54,870.07 and 21,856.76 is: 30,161.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,761.81 : 54,870.07 = 21,856.76 : x
  2. Step 2: Convert to fraction form
    39,761.81/54,870.07 = 21,856.76/x
  3. Step 3: Cross multiply
    39,761.81x = 54,870.07 × 21,856.76
  4. Step 4: Simplify right side
    39,761.81x = 1,199,281,951.17
  5. Step 5: Solve for x
    x = 1,199,281,951.17/39,761.81
  6. Step 6: Final answer
    x = 30,161.65

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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.