Home / 39,300.48-54,235.79-21,395.78

Finding the Fourth Proportional to 39,300.48, 54,235.79 and 21,395.78

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Solution

The fourth proportional to 39,300.48, 54,235.79 and 21,395.78 is: 29,526.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,300.48 : 54,235.79 = 21,395.78 : x
  2. Step 2: Convert to fraction form
    39,300.48/54,235.79 = 21,395.78/x
  3. Step 3: Cross multiply
    39,300.48x = 54,235.79 × 21,395.78
  4. Step 4: Simplify right side
    39,300.48x = 1,160,417,030.97
  5. Step 5: Solve for x
    x = 1,160,417,030.97/39,300.48
  6. Step 6: Final answer
    x = 29,526.79

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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.