Home / 13,117.70-18,123.53-9,156.39

Finding the Fourth Proportional to 13,117.70, 18,123.53 and 9,156.39

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Solution

The fourth proportional to 13,117.70, 18,123.53 and 9,156.39 is: 12,650.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.70 : 18,123.53 = 9,156.39 : x
  2. Step 2: Convert to fraction form
    13,117.70/18,123.53 = 9,156.39/x
  3. Step 3: Cross multiply
    13,117.70x = 18,123.53 × 9,156.39
  4. Step 4: Simplify right side
    13,117.70x = 165,946,063.07
  5. Step 5: Solve for x
    x = 165,946,063.07/13,117.70
  6. Step 6: Final answer
    x = 12,650.55

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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.