Home / 15,666.40-21,612.18-9,377.56

Finding the Fourth Proportional to 15,666.40, 21,612.18 and 9,377.56

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Solution

The fourth proportional to 15,666.40, 21,612.18 and 9,377.56 is: 12,936.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.40 : 21,612.18 = 9,377.56 : x
  2. Step 2: Convert to fraction form
    15,666.40/21,612.18 = 9,377.56/x
  3. Step 3: Cross multiply
    15,666.40x = 21,612.18 × 9,377.56
  4. Step 4: Simplify right side
    15,666.40x = 202,669,514.68
  5. Step 5: Solve for x
    x = 202,669,514.68/15,666.40
  6. Step 6: Final answer
    x = 12,936.57

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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.