Home / 13,423.79-18,503.28-9,115.53

Finding the Fourth Proportional to 13,423.79, 18,503.28 and 9,115.53

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Solution

The fourth proportional to 13,423.79, 18,503.28 and 9,115.53 is: 12,564.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.79 : 18,503.28 = 9,115.53 : x
  2. Step 2: Convert to fraction form
    13,423.79/18,503.28 = 9,115.53/x
  3. Step 3: Cross multiply
    13,423.79x = 18,503.28 × 9,115.53
  4. Step 4: Simplify right side
    13,423.79x = 168,667,203.94
  5. Step 5: Solve for x
    x = 168,667,203.94/13,423.79
  6. Step 6: Final answer
    x = 12,564.80

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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.