Home / 18,045.13-24,902.45-9,978.68

Finding the Fourth Proportional to 18,045.13, 24,902.45 and 9,978.68

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Solution

The fourth proportional to 18,045.13, 24,902.45 and 9,978.68 is: 13,770.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,045.13 : 24,902.45 = 9,978.68 : x
  2. Step 2: Convert to fraction form
    18,045.13/24,902.45 = 9,978.68/x
  3. Step 3: Cross multiply
    18,045.13x = 24,902.45 × 9,978.68
  4. Step 4: Simplify right side
    18,045.13x = 248,493,579.77
  5. Step 5: Solve for x
    x = 248,493,579.77/18,045.13
  6. Step 6: Final answer
    x = 13,770.67

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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.