Home / 42,309.80-63,440.40-12,723.20

Finding the Fourth Proportional to 42,309.80, 63,440.40 and 12,723.20

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Solution

The fourth proportional to 42,309.80, 63,440.40 and 12,723.20 is: 19,077.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,309.80 : 63,440.40 = 12,723.20 : x
  2. Step 2: Convert to fraction form
    42,309.80/63,440.40 = 12,723.20/x
  3. Step 3: Cross multiply
    42,309.80x = 63,440.40 × 12,723.20
  4. Step 4: Simplify right side
    42,309.80x = 807,164,897.28
  5. Step 5: Solve for x
    x = 807,164,897.28/42,309.80
  6. Step 6: Final answer
    x = 19,077.49

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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.