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Finding the Fourth Proportional to 18,869.60, 26,041.50 and 11,316.22

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Solution

The fourth proportional to 18,869.60, 26,041.50 and 11,316.22 is: 15,617.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.60 : 26,041.50 = 11,316.22 : x
  2. Step 2: Convert to fraction form
    18,869.60/26,041.50 = 11,316.22/x
  3. Step 3: Cross multiply
    18,869.60x = 26,041.50 × 11,316.22
  4. Step 4: Simplify right side
    18,869.60x = 294,691,343.13
  5. Step 5: Solve for x
    x = 294,691,343.13/18,869.60
  6. Step 6: Final answer
    x = 15,617.25

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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.