Home / 18,421.32-25,407.90-11,701.20

Finding the Fourth Proportional to 18,421.32, 25,407.90 and 11,701.20

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Solution

The fourth proportional to 18,421.32, 25,407.90 and 11,701.20 is: 16,139.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.32 : 25,407.90 = 11,701.20 : x
  2. Step 2: Convert to fraction form
    18,421.32/25,407.90 = 11,701.20/x
  3. Step 3: Cross multiply
    18,421.32x = 25,407.90 × 11,701.20
  4. Step 4: Simplify right side
    18,421.32x = 297,302,919.48
  5. Step 5: Solve for x
    x = 297,302,919.48/18,421.32
  6. Step 6: Final answer
    x = 16,139.07

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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.