Home / 20,389.45-30,587.22-7,240.72

Finding the Fourth Proportional to 20,389.45, 30,587.22 and 7,240.72

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Solution

The fourth proportional to 20,389.45, 30,587.22 and 7,240.72 is: 10,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.45 : 30,587.22 = 7,240.72 : x
  2. Step 2: Convert to fraction form
    20,389.45/30,587.22 = 7,240.72/x
  3. Step 3: Cross multiply
    20,389.45x = 30,587.22 × 7,240.72
  4. Step 4: Simplify right side
    20,389.45x = 221,473,495.60
  5. Step 5: Solve for x
    x = 221,473,495.60/20,389.45
  6. Step 6: Final answer
    x = 10,862.16

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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.