Home / 20,518.65-28,363.56-18,302.49

Finding the Fourth Proportional to 20,518.65, 28,363.56 and 18,302.49

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Solution

The fourth proportional to 20,518.65, 28,363.56 and 18,302.49 is: 25,300.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.65 : 28,363.56 = 18,302.49 : x
  2. Step 2: Convert to fraction form
    20,518.65/28,363.56 = 18,302.49/x
  3. Step 3: Cross multiply
    20,518.65x = 28,363.56 × 18,302.49
  4. Step 4: Simplify right side
    20,518.65x = 519,123,773.26
  5. Step 5: Solve for x
    x = 519,123,773.26/20,518.65
  6. Step 6: Final answer
    x = 25,300.09

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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.