Home / 39,666.90-54,740.88-21,761.58

Finding the Fourth Proportional to 39,666.90, 54,740.88 and 21,761.58

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Solution

The fourth proportional to 39,666.90, 54,740.88 and 21,761.58 is: 30,031.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,666.90 : 54,740.88 = 21,761.58 : x
  2. Step 2: Convert to fraction form
    39,666.90/54,740.88 = 21,761.58/x
  3. Step 3: Cross multiply
    39,666.90x = 54,740.88 × 21,761.58
  4. Step 4: Simplify right side
    39,666.90x = 1,191,248,039.39
  5. Step 5: Solve for x
    x = 1,191,248,039.39/39,666.90
  6. Step 6: Final answer
    x = 30,031.29

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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.