Home / 52,612.20-78,879.90-21,431.40

Finding the Fourth Proportional to 52,612.20, 78,879.90 and 21,431.40

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Solution

The fourth proportional to 52,612.20, 78,879.90 and 21,431.40 is: 32,131.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,612.20 : 78,879.90 = 21,431.40 : x
  2. Step 2: Convert to fraction form
    52,612.20/78,879.90 = 21,431.40/x
  3. Step 3: Cross multiply
    52,612.20x = 78,879.90 × 21,431.40
  4. Step 4: Simplify right side
    52,612.20x = 1,690,506,688.86
  5. Step 5: Solve for x
    x = 1,690,506,688.86/52,612.20
  6. Step 6: Final answer
    x = 32,131.46

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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.