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Finding the Fourth Proportional to 15,811.98, 23,733.98 and 7,920.15

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Solution

The fourth proportional to 15,811.98, 23,733.98 and 7,920.15 is: 11,888.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.98 : 23,733.98 = 7,920.15 : x
  2. Step 2: Convert to fraction form
    15,811.98/23,733.98 = 7,920.15/x
  3. Step 3: Cross multiply
    15,811.98x = 23,733.98 × 7,920.15
  4. Step 4: Simplify right side
    15,811.98x = 187,976,681.70
  5. Step 5: Solve for x
    x = 187,976,681.70/15,811.98
  6. Step 6: Final answer
    x = 11,888.24

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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.