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Finding the Fourth Proportional to 28,315.73, 42,478.95 and 9,341.45

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Solution

The fourth proportional to 28,315.73, 42,478.95 and 9,341.45 is: 14,013.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.73 : 42,478.95 = 9,341.45 : x
  2. Step 2: Convert to fraction form
    28,315.73/42,478.95 = 9,341.45/x
  3. Step 3: Cross multiply
    28,315.73x = 42,478.95 × 9,341.45
  4. Step 4: Simplify right side
    28,315.73x = 396,814,987.48
  5. Step 5: Solve for x
    x = 396,814,987.48/28,315.73
  6. Step 6: Final answer
    x = 14,013.94

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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.