Home / 21,091.04-31,647.85-13,693.76

Finding the Fourth Proportional to 21,091.04, 31,647.85 and 13,693.76

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Solution

The fourth proportional to 21,091.04, 31,647.85 and 13,693.76 is: 20,547.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.04 : 31,647.85 = 13,693.76 : x
  2. Step 2: Convert to fraction form
    21,091.04/31,647.85 = 13,693.76/x
  3. Step 3: Cross multiply
    21,091.04x = 31,647.85 × 13,693.76
  4. Step 4: Simplify right side
    21,091.04x = 433,378,062.42
  5. Step 5: Solve for x
    x = 433,378,062.42/21,091.04
  6. Step 6: Final answer
    x = 20,547.97

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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.