Home / 22,479.40-31,019.36-12,407.19

Finding the Fourth Proportional to 22,479.40, 31,019.36 and 12,407.19

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Solution

The fourth proportional to 22,479.40, 31,019.36 and 12,407.19 is: 17,120.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,479.40 : 31,019.36 = 12,407.19 : x
  2. Step 2: Convert to fraction form
    22,479.40/31,019.36 = 12,407.19/x
  3. Step 3: Cross multiply
    22,479.40x = 31,019.36 × 12,407.19
  4. Step 4: Simplify right side
    22,479.40x = 384,863,093.20
  5. Step 5: Solve for x
    x = 384,863,093.20/22,479.40
  6. Step 6: Final answer
    x = 17,120.70

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Half scale
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Double scale
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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.