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Finding the Fourth Proportional to 28,220, 42,328.38 and 8,498.12

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Solution

The fourth proportional to 28,220, 42,328.38 and 8,498.12 is: 12,746.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220 : 42,328.38 = 8,498.12 : x
  2. Step 2: Convert to fraction form
    28,220/42,328.38 = 8,498.12/x
  3. Step 3: Cross multiply
    28,220x = 42,328.38 × 8,498.12
  4. Step 4: Simplify right side
    28,220x = 359,711,652.65
  5. Step 5: Solve for x
    x = 359,711,652.65/28,220
  6. Step 6: Final answer
    x = 12,746.69

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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.