Home / 13,731.42-20,547.89-11,888.88

Finding the Fourth Proportional to 13,731.42, 20,547.89 and 11,888.88

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Solution

The fourth proportional to 13,731.42, 20,547.89 and 11,888.88 is: 17,790.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.42 : 20,547.89 = 11,888.88 : x
  2. Step 2: Convert to fraction form
    13,731.42/20,547.89 = 11,888.88/x
  3. Step 3: Cross multiply
    13,731.42x = 20,547.89 × 11,888.88
  4. Step 4: Simplify right side
    13,731.42x = 244,291,398.46
  5. Step 5: Solve for x
    x = 244,291,398.46/13,731.42
  6. Step 6: Final answer
    x = 17,790.69

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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.