Home / 42,780.08-64,146.62-13,189.70

Finding the Fourth Proportional to 42,780.08, 64,146.62 and 13,189.70

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Solution

The fourth proportional to 42,780.08, 64,146.62 and 13,189.70 is: 19,777.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,780.08 : 64,146.62 = 13,189.70 : x
  2. Step 2: Convert to fraction form
    42,780.08/64,146.62 = 13,189.70/x
  3. Step 3: Cross multiply
    42,780.08x = 64,146.62 × 13,189.70
  4. Step 4: Simplify right side
    42,780.08x = 846,074,673.81
  5. Step 5: Solve for x
    x = 846,074,673.81/42,780.08
  6. Step 6: Final answer
    x = 19,777.30

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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.