Home / 39,871.52-55,023.40-21,966.40

Finding the Fourth Proportional to 39,871.52, 55,023.40 and 21,966.40

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Solution

The fourth proportional to 39,871.52, 55,023.40 and 21,966.40 is: 30,314.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,871.52 : 55,023.40 = 21,966.40 : x
  2. Step 2: Convert to fraction form
    39,871.52/55,023.40 = 21,966.40/x
  3. Step 3: Cross multiply
    39,871.52x = 55,023.40 × 21,966.40
  4. Step 4: Simplify right side
    39,871.52x = 1,208,666,013.76
  5. Step 5: Solve for x
    x = 1,208,666,013.76/39,871.52
  6. Step 6: Final answer
    x = 30,314.02

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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.