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Finding the Fourth Proportional to 18,835.30, 28,258.30 and 15,358.20

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Solution

The fourth proportional to 18,835.30, 28,258.30 and 15,358.20 is: 23,041.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835.30 : 28,258.30 = 15,358.20 : x
  2. Step 2: Convert to fraction form
    18,835.30/28,258.30 = 15,358.20/x
  3. Step 3: Cross multiply
    18,835.30x = 28,258.30 × 15,358.20
  4. Step 4: Simplify right side
    18,835.30x = 433,996,536.29
  5. Step 5: Solve for x
    x = 433,996,536.29/18,835.30
  6. Step 6: Final answer
    x = 23,041.66

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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.