Home / 20,787.56-31,191.77-9,695.12

Finding the Fourth Proportional to 20,787.56, 31,191.77 and 9,695.12

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Solution

The fourth proportional to 20,787.56, 31,191.77 and 9,695.12 is: 14,547.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.56 : 31,191.77 = 9,695.12 : x
  2. Step 2: Convert to fraction form
    20,787.56/31,191.77 = 9,695.12/x
  3. Step 3: Cross multiply
    20,787.56x = 31,191.77 × 9,695.12
  4. Step 4: Simplify right side
    20,787.56x = 302,407,953.16
  5. Step 5: Solve for x
    x = 302,407,953.16/20,787.56
  6. Step 6: Final answer
    x = 14,547.54

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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.