Home / 15,430.11-21,293.61-8,715.81

Finding the Fourth Proportional to 15,430.11, 21,293.61 and 8,715.81

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Solution

The fourth proportional to 15,430.11, 21,293.61 and 8,715.81 is: 12,027.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.11 : 21,293.61 = 8,715.81 : x
  2. Step 2: Convert to fraction form
    15,430.11/21,293.61 = 8,715.81/x
  3. Step 3: Cross multiply
    15,430.11x = 21,293.61 × 8,715.81
  4. Step 4: Simplify right side
    15,430.11x = 185,591,058.97
  5. Step 5: Solve for x
    x = 185,591,058.97/15,430.11
  6. Step 6: Final answer
    x = 12,027.85

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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.