Home / 15,379.74-21,223.76-8,665.20

Finding the Fourth Proportional to 15,379.74, 21,223.76 and 8,665.20

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Solution

The fourth proportional to 15,379.74, 21,223.76 and 8,665.20 is: 11,957.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,379.74 : 21,223.76 = 8,665.20 : x
  2. Step 2: Convert to fraction form
    15,379.74/21,223.76 = 8,665.20/x
  3. Step 3: Cross multiply
    15,379.74x = 21,223.76 × 8,665.20
  4. Step 4: Simplify right side
    15,379.74x = 183,908,081.83
  5. Step 5: Solve for x
    x = 183,908,081.83/15,379.74
  6. Step 6: Final answer
    x = 11,957.81

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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.