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Finding the Fourth Proportional to 13,405.70, 18,501.18 and 7,437.38

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Solution

The fourth proportional to 13,405.70, 18,501.18 and 7,437.38 is: 10,264.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.70 : 18,501.18 = 7,437.38 : x
  2. Step 2: Convert to fraction form
    13,405.70/18,501.18 = 7,437.38/x
  3. Step 3: Cross multiply
    13,405.70x = 18,501.18 × 7,437.38
  4. Step 4: Simplify right side
    13,405.70x = 137,600,306.11
  5. Step 5: Solve for x
    x = 137,600,306.11/13,405.70
  6. Step 6: Final answer
    x = 10,264.31

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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.