Home / 13,395.34-18,489.21-8,356.57

Finding the Fourth Proportional to 13,395.34, 18,489.21 and 8,356.57

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Solution

The fourth proportional to 13,395.34, 18,489.21 and 8,356.57 is: 11,534.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.34 : 18,489.21 = 8,356.57 : x
  2. Step 2: Convert to fraction form
    13,395.34/18,489.21 = 8,356.57/x
  3. Step 3: Cross multiply
    13,395.34x = 18,489.21 × 8,356.57
  4. Step 4: Simplify right side
    13,395.34x = 154,506,377.61
  5. Step 5: Solve for x
    x = 154,506,377.61/13,395.34
  6. Step 6: Final answer
    x = 11,534.34

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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.