Home / 27,777.12-38,332.40-15,680.15

Finding the Fourth Proportional to 27,777.12, 38,332.40 and 15,680.15

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Solution

The fourth proportional to 27,777.12, 38,332.40 and 15,680.15 is: 21,638.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,777.12 : 38,332.40 = 15,680.15 : x
  2. Step 2: Convert to fraction form
    27,777.12/38,332.40 = 15,680.15/x
  3. Step 3: Cross multiply
    27,777.12x = 38,332.40 × 15,680.15
  4. Step 4: Simplify right side
    27,777.12x = 601,057,511.80
  5. Step 5: Solve for x
    x = 601,057,511.80/27,777.12
  6. Step 6: Final answer
    x = 21,638.58

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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.