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Finding the Fourth Proportional to 28,588.90, 42,879.30 and 8,869.45

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Solution

The fourth proportional to 28,588.90, 42,879.30 and 8,869.45 is: 13,302.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,588.90 : 42,879.30 = 8,869.45 : x
  2. Step 2: Convert to fraction form
    28,588.90/42,879.30 = 8,869.45/x
  3. Step 3: Cross multiply
    28,588.90x = 42,879.30 × 8,869.45
  4. Step 4: Simplify right side
    28,588.90x = 380,315,807.39
  5. Step 5: Solve for x
    x = 380,315,807.39/28,588.90
  6. Step 6: Final answer
    x = 13,302.92

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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.