Home / 22,231.08-30,678.36-12,407.40

Finding the Fourth Proportional to 22,231.08, 30,678.36 and 12,407.40

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Solution

The fourth proportional to 22,231.08, 30,678.36 and 12,407.40 is: 17,121.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,231.08 : 30,678.36 = 12,407.40 : x
  2. Step 2: Convert to fraction form
    22,231.08/30,678.36 = 12,407.40/x
  3. Step 3: Cross multiply
    22,231.08x = 30,678.36 × 12,407.40
  4. Step 4: Simplify right side
    22,231.08x = 380,638,683.86
  5. Step 5: Solve for x
    x = 380,638,683.86/22,231.08
  6. Step 6: Final answer
    x = 17,121.92

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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.