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Finding the Fourth Proportional to 15,799.20, 21,802.02 and 9,830.68

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Solution

The fourth proportional to 15,799.20, 21,802.02 and 9,830.68 is: 13,565.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,799.20 : 21,802.02 = 9,830.68 : x
  2. Step 2: Convert to fraction form
    15,799.20/21,802.02 = 9,830.68/x
  3. Step 3: Cross multiply
    15,799.20x = 21,802.02 × 9,830.68
  4. Step 4: Simplify right side
    15,799.20x = 214,328,681.97
  5. Step 5: Solve for x
    x = 214,328,681.97/15,799.20
  6. Step 6: Final answer
    x = 13,565.79

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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.