Home / 18,870.20-28,243.70-13,009.08

Finding the Fourth Proportional to 18,870.20, 28,243.70 and 13,009.08

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Solution

The fourth proportional to 18,870.20, 28,243.70 and 13,009.08 is: 19,471.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.20 : 28,243.70 = 13,009.08 : x
  2. Step 2: Convert to fraction form
    18,870.20/28,243.70 = 13,009.08/x
  3. Step 3: Cross multiply
    18,870.20x = 28,243.70 × 13,009.08
  4. Step 4: Simplify right side
    18,870.20x = 367,424,552.80
  5. Step 5: Solve for x
    x = 367,424,552.80/18,870.20
  6. Step 6: Final answer
    x = 19,471.15

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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.