Home / 15,623.75-21,538.35-11,139.72

Finding the Fourth Proportional to 15,623.75, 21,538.35 and 11,139.72

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Solution

The fourth proportional to 15,623.75, 21,538.35 and 11,139.72 is: 15,356.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,623.75 : 21,538.35 = 11,139.72 : x
  2. Step 2: Convert to fraction form
    15,623.75/21,538.35 = 11,139.72/x
  3. Step 3: Cross multiply
    15,623.75x = 21,538.35 × 11,139.72
  4. Step 4: Simplify right side
    15,623.75x = 239,931,188.26
  5. Step 5: Solve for x
    x = 239,931,188.26/15,623.75
  6. Step 6: Final answer
    x = 15,356.83

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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.