Home / 20,358.18-28,095.30-11,405.10

Finding the Fourth Proportional to 20,358.18, 28,095.30 and 11,405.10

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Solution

The fourth proportional to 20,358.18, 28,095.30 and 11,405.10 is: 15,739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.18 : 28,095.30 = 11,405.10 : x
  2. Step 2: Convert to fraction form
    20,358.18/28,095.30 = 11,405.10/x
  3. Step 3: Cross multiply
    20,358.18x = 28,095.30 × 11,405.10
  4. Step 4: Simplify right side
    20,358.18x = 320,429,706.03
  5. Step 5: Solve for x
    x = 320,429,706.03/20,358.18
  6. Step 6: Final answer
    x = 15,739.60

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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.