Home / 30,117.22-45,178.90-10,391.15

Finding the Fourth Proportional to 30,117.22, 45,178.90 and 10,391.15

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Solution

The fourth proportional to 30,117.22, 45,178.90 and 10,391.15 is: 15,587.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,117.22 : 45,178.90 = 10,391.15 : x
  2. Step 2: Convert to fraction form
    30,117.22/45,178.90 = 10,391.15/x
  3. Step 3: Cross multiply
    30,117.22x = 45,178.90 × 10,391.15
  4. Step 4: Simplify right side
    30,117.22x = 469,460,813.70
  5. Step 5: Solve for x
    x = 469,460,813.70/30,117.22
  6. Step 6: Final answer
    x = 15,587.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.