Home / 13,868.90-19,139.07-7,581.28

Finding the Fourth Proportional to 13,868.90, 19,139.07 and 7,581.28

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Solution

The fourth proportional to 13,868.90, 19,139.07 and 7,581.28 is: 10,462.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.90 : 19,139.07 = 7,581.28 : x
  2. Step 2: Convert to fraction form
    13,868.90/19,139.07 = 7,581.28/x
  3. Step 3: Cross multiply
    13,868.90x = 19,139.07 × 7,581.28
  4. Step 4: Simplify right side
    13,868.90x = 145,098,648.61
  5. Step 5: Solve for x
    x = 145,098,648.61/13,868.90
  6. Step 6: Final answer
    x = 10,462.16

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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.