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Finding the Fourth Proportional to 11,291.60, 15,669.98 and 10,830.80

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Solution

The fourth proportional to 11,291.60, 15,669.98 and 10,830.80 is: 15,030.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,291.60 : 15,669.98 = 10,830.80 : x
  2. Step 2: Convert to fraction form
    11,291.60/15,669.98 = 10,830.80/x
  3. Step 3: Cross multiply
    11,291.60x = 15,669.98 × 10,830.80
  4. Step 4: Simplify right side
    11,291.60x = 169,718,419.38
  5. Step 5: Solve for x
    x = 169,718,419.38/11,291.60
  6. Step 6: Final answer
    x = 15,030.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.