Home / 15,347.85-21,178.13-9,680.45

Finding the Fourth Proportional to 15,347.85, 21,178.13 and 9,680.45

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Solution

The fourth proportional to 15,347.85, 21,178.13 and 9,680.45 is: 13,357.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.85 : 21,178.13 = 9,680.45 : x
  2. Step 2: Convert to fraction form
    15,347.85/21,178.13 = 9,680.45/x
  3. Step 3: Cross multiply
    15,347.85x = 21,178.13 × 9,680.45
  4. Step 4: Simplify right side
    15,347.85x = 205,013,934.63
  5. Step 5: Solve for x
    x = 205,013,934.63/15,347.85
  6. Step 6: Final answer
    x = 13,357.83

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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.