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Finding the Fourth Proportional to 15,400.69, 21,233.69 and 12,852.11

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Solution

The fourth proportional to 15,400.69, 21,233.69 and 12,852.11 is: 17,719.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.69 : 21,233.69 = 12,852.11 : x
  2. Step 2: Convert to fraction form
    15,400.69/21,233.69 = 12,852.11/x
  3. Step 3: Cross multiply
    15,400.69x = 21,233.69 × 12,852.11
  4. Step 4: Simplify right side
    15,400.69x = 272,897,708.41
  5. Step 5: Solve for x
    x = 272,897,708.41/15,400.69
  6. Step 6: Final answer
    x = 17,719.84

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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.