Home / 30,854.90-42,580.42-18,117.12

Finding the Fourth Proportional to 30,854.90, 42,580.42 and 18,117.12

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Solution

The fourth proportional to 30,854.90, 42,580.42 and 18,117.12 is: 25,002.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,854.90 : 42,580.42 = 18,117.12 : x
  2. Step 2: Convert to fraction form
    30,854.90/42,580.42 = 18,117.12/x
  3. Step 3: Cross multiply
    30,854.90x = 42,580.42 × 18,117.12
  4. Step 4: Simplify right side
    30,854.90x = 771,434,578.79
  5. Step 5: Solve for x
    x = 771,434,578.79/30,854.90
  6. Step 6: Final answer
    x = 25,002.01

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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.