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Finding the Fourth Proportional to 18,888.95, 26,065.15 and 10,931.69

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Solution

The fourth proportional to 18,888.95, 26,065.15 and 10,931.69 is: 15,084.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.95 : 26,065.15 = 10,931.69 : x
  2. Step 2: Convert to fraction form
    18,888.95/26,065.15 = 10,931.69/x
  3. Step 3: Cross multiply
    18,888.95x = 26,065.15 × 10,931.69
  4. Step 4: Simplify right side
    18,888.95x = 284,936,139.60
  5. Step 5: Solve for x
    x = 284,936,139.60/18,888.95
  6. Step 6: Final answer
    x = 15,084.81

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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.