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Finding the Fourth Proportional to 15,501.85, 21,731.75 and 15,501.85

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Solution

The fourth proportional to 15,501.85, 21,731.75 and 15,501.85 is: 21,731.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.85 : 21,731.75 = 15,501.85 : x
  2. Step 2: Convert to fraction form
    15,501.85/21,731.75 = 15,501.85/x
  3. Step 3: Cross multiply
    15,501.85x = 21,731.75 × 15,501.85
  4. Step 4: Simplify right side
    15,501.85x = 336,882,328.74
  5. Step 5: Solve for x
    x = 336,882,328.74/15,501.85
  6. Step 6: Final answer
    x = 21,731.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.