Home / 13,215.95-18,236.72-7,910.66

Finding the Fourth Proportional to 13,215.95, 18,236.72 and 7,910.66

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Solution

The fourth proportional to 13,215.95, 18,236.72 and 7,910.66 is: 10,915.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.95 : 18,236.72 = 7,910.66 : x
  2. Step 2: Convert to fraction form
    13,215.95/18,236.72 = 7,910.66/x
  3. Step 3: Cross multiply
    13,215.95x = 18,236.72 × 7,910.66
  4. Step 4: Simplify right side
    13,215.95x = 144,264,360.70
  5. Step 5: Solve for x
    x = 144,264,360.70/13,215.95
  6. Step 6: Final answer
    x = 10,915.93

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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.