Home / 15,116.77-20,859.85-8,400.25

Finding the Fourth Proportional to 15,116.77, 20,859.85 and 8,400.25

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Solution

The fourth proportional to 15,116.77, 20,859.85 and 8,400.25 is: 11,591.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,116.77 : 20,859.85 = 8,400.25 : x
  2. Step 2: Convert to fraction form
    15,116.77/20,859.85 = 8,400.25/x
  3. Step 3: Cross multiply
    15,116.77x = 20,859.85 × 8,400.25
  4. Step 4: Simplify right side
    15,116.77x = 175,227,881.81
  5. Step 5: Solve for x
    x = 175,227,881.81/15,116.77
  6. Step 6: Final answer
    x = 11,591.62

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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.