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Finding the Fourth Proportional to 28,641.09, 42,951.39 and 9,916.10

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Solution

The fourth proportional to 28,641.09, 42,951.39 and 9,916.10 is: 14,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.09 : 42,951.39 = 9,916.10 : x
  2. Step 2: Convert to fraction form
    28,641.09/42,951.39 = 9,916.10/x
  3. Step 3: Cross multiply
    28,641.09x = 42,951.39 × 9,916.10
  4. Step 4: Simplify right side
    28,641.09x = 425,910,228.80
  5. Step 5: Solve for x
    x = 425,910,228.80/28,641.09
  6. Step 6: Final answer
    x = 14,870.60

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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.