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Finding the Fourth Proportional to 28,649.29, 42,974.50 and 9,929.93

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Solution

The fourth proportional to 28,649.29, 42,974.50 and 9,929.93 is: 14,895.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.29 : 42,974.50 = 9,929.93 : x
  2. Step 2: Convert to fraction form
    28,649.29/42,974.50 = 9,929.93/x
  3. Step 3: Cross multiply
    28,649.29x = 42,974.50 × 9,929.93
  4. Step 4: Simplify right side
    28,649.29x = 426,733,859.40
  5. Step 5: Solve for x
    x = 426,733,859.40/28,649.29
  6. Step 6: Final answer
    x = 14,895.10

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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.