Home / 28,040.40-42,060.30-8,319.15

Finding the Fourth Proportional to 28,040.40, 42,060.30 and 8,319.15

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Solution

The fourth proportional to 28,040.40, 42,060.30 and 8,319.15 is: 12,478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,040.40 : 42,060.30 = 8,319.15 : x
  2. Step 2: Convert to fraction form
    28,040.40/42,060.30 = 8,319.15/x
  3. Step 3: Cross multiply
    28,040.40x = 42,060.30 × 8,319.15
  4. Step 4: Simplify right side
    28,040.40x = 349,905,944.75
  5. Step 5: Solve for x
    x = 349,905,944.75/28,040.40
  6. Step 6: Final answer
    x = 12,478.64

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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.