Home / 21,007.34-28,990.08-11,575.91

Finding the Fourth Proportional to 21,007.34, 28,990.08 and 11,575.91

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Solution

The fourth proportional to 21,007.34, 28,990.08 and 11,575.91 is: 15,974.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.34 : 28,990.08 = 11,575.91 : x
  2. Step 2: Convert to fraction form
    21,007.34/28,990.08 = 11,575.91/x
  3. Step 3: Cross multiply
    21,007.34x = 28,990.08 × 11,575.91
  4. Step 4: Simplify right side
    21,007.34x = 335,586,412.02
  5. Step 5: Solve for x
    x = 335,586,412.02/21,007.34
  6. Step 6: Final answer
    x = 15,974.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.