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Finding the Fourth Proportional to 15,762.48, 21,752.11 and 8,688.88

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Solution

The fourth proportional to 15,762.48, 21,752.11 and 8,688.88 is: 11,990.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,762.48 : 21,752.11 = 8,688.88 : x
  2. Step 2: Convert to fraction form
    15,762.48/21,752.11 = 8,688.88/x
  3. Step 3: Cross multiply
    15,762.48x = 21,752.11 × 8,688.88
  4. Step 4: Simplify right side
    15,762.48x = 189,001,473.54
  5. Step 5: Solve for x
    x = 189,001,473.54/15,762.48
  6. Step 6: Final answer
    x = 11,990.59

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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.