Home / 20,430.38-30,630.35-8,587.62

Finding the Fourth Proportional to 20,430.38, 30,630.35 and 8,587.62

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Solution

The fourth proportional to 20,430.38, 30,630.35 and 8,587.62 is: 12,875.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.38 : 30,630.35 = 8,587.62 : x
  2. Step 2: Convert to fraction form
    20,430.38/30,630.35 = 8,587.62/x
  3. Step 3: Cross multiply
    20,430.38x = 30,630.35 × 8,587.62
  4. Step 4: Simplify right side
    20,430.38x = 263,041,827.74
  5. Step 5: Solve for x
    x = 263,041,827.74/20,430.38
  6. Step 6: Final answer
    x = 12,875.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.