Home / 13,565.70-18,708.18-9,309.25

Finding the Fourth Proportional to 13,565.70, 18,708.18 and 9,309.25

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Solution

The fourth proportional to 13,565.70, 18,708.18 and 9,309.25 is: 12,838.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,565.70 : 18,708.18 = 9,309.25 : x
  2. Step 2: Convert to fraction form
    13,565.70/18,708.18 = 9,309.25/x
  3. Step 3: Cross multiply
    13,565.70x = 18,708.18 × 9,309.25
  4. Step 4: Simplify right side
    13,565.70x = 174,159,113.14
  5. Step 5: Solve for x
    x = 174,159,113.14/13,565.70
  6. Step 6: Final answer
    x = 12,838.20

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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.