Home / 20,225.40-30,338.10-18,111.30

Finding the Fourth Proportional to 20,225.40, 30,338.10 and 18,111.30

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Solution

The fourth proportional to 20,225.40, 30,338.10 and 18,111.30 is: 27,166.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,225.40 : 30,338.10 = 18,111.30 : x
  2. Step 2: Convert to fraction form
    20,225.40/30,338.10 = 18,111.30/x
  3. Step 3: Cross multiply
    20,225.40x = 30,338.10 × 18,111.30
  4. Step 4: Simplify right side
    20,225.40x = 549,462,430.53
  5. Step 5: Solve for x
    x = 549,462,430.53/20,225.40
  6. Step 6: Final answer
    x = 27,166.95

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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.