Home / 39,228.81-54,135.86-21,323.79

Finding the Fourth Proportional to 39,228.81, 54,135.86 and 21,323.79

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Solution

The fourth proportional to 39,228.81, 54,135.86 and 21,323.79 is: 29,426.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,228.81 : 54,135.86 = 21,323.79 : x
  2. Step 2: Convert to fraction form
    39,228.81/54,135.86 = 21,323.79/x
  3. Step 3: Cross multiply
    39,228.81x = 54,135.86 × 21,323.79
  4. Step 4: Simplify right side
    39,228.81x = 1,154,381,603.49
  5. Step 5: Solve for x
    x = 1,154,381,603.49/39,228.81
  6. Step 6: Final answer
    x = 29,426.88

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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.