Home / 28,240.10-42,360.15-8,521.70

Finding the Fourth Proportional to 28,240.10, 42,360.15 and 8,521.70

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Solution

The fourth proportional to 28,240.10, 42,360.15 and 8,521.70 is: 12,782.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.10 : 42,360.15 = 8,521.70 : x
  2. Step 2: Convert to fraction form
    28,240.10/42,360.15 = 8,521.70/x
  3. Step 3: Cross multiply
    28,240.10x = 42,360.15 × 8,521.70
  4. Step 4: Simplify right side
    28,240.10x = 360,980,490.26
  5. Step 5: Solve for x
    x = 360,980,490.26/28,240.10
  6. Step 6: Final answer
    x = 12,782.55

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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.