Home / 20,877.12-31,289.76-9,769.32

Finding the Fourth Proportional to 20,877.12, 31,289.76 and 9,769.32

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Solution

The fourth proportional to 20,877.12, 31,289.76 and 9,769.32 is: 14,641.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.12 : 31,289.76 = 9,769.32 : x
  2. Step 2: Convert to fraction form
    20,877.12/31,289.76 = 9,769.32/x
  3. Step 3: Cross multiply
    20,877.12x = 31,289.76 × 9,769.32
  4. Step 4: Simplify right side
    20,877.12x = 305,679,678.16
  5. Step 5: Solve for x
    x = 305,679,678.16/20,877.12
  6. Step 6: Final answer
    x = 14,641.85

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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.