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Finding the Fourth Proportional to 18,888.71, 26,065.40 and 10,389.46

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Solution

The fourth proportional to 18,888.71, 26,065.40 and 10,389.46 is: 14,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.71 : 26,065.40 = 10,389.46 : x
  2. Step 2: Convert to fraction form
    18,888.71/26,065.40 = 10,389.46/x
  3. Step 3: Cross multiply
    18,888.71x = 26,065.40 × 10,389.46
  4. Step 4: Simplify right side
    18,888.71x = 270,805,313.57
  5. Step 5: Solve for x
    x = 270,805,313.57/18,888.71
  6. Step 6: Final answer
    x = 14,336.89

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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.