Home / 13,510.89-18,638.57-8,472.59

Finding the Fourth Proportional to 13,510.89, 18,638.57 and 8,472.59

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Solution

The fourth proportional to 13,510.89, 18,638.57 and 8,472.59 is: 11,688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,510.89 : 18,638.57 = 8,472.59 : x
  2. Step 2: Convert to fraction form
    13,510.89/18,638.57 = 8,472.59/x
  3. Step 3: Cross multiply
    13,510.89x = 18,638.57 × 8,472.59
  4. Step 4: Simplify right side
    13,510.89x = 157,916,961.80
  5. Step 5: Solve for x
    x = 157,916,961.80/13,510.89
  6. Step 6: Final answer
    x = 11,688.12

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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.