Home / 28,617.90-42,916.05-11,979.09

Finding the Fourth Proportional to 28,617.90, 42,916.05 and 11,979.09

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Solution

The fourth proportional to 28,617.90, 42,916.05 and 11,979.09 is: 17,964.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617.90 : 42,916.05 = 11,979.09 : x
  2. Step 2: Convert to fraction form
    28,617.90/42,916.05 = 11,979.09/x
  3. Step 3: Cross multiply
    28,617.90x = 42,916.05 × 11,979.09
  4. Step 4: Simplify right side
    28,617.90x = 514,095,225.39
  5. Step 5: Solve for x
    x = 514,095,225.39/28,617.90
  6. Step 6: Final answer
    x = 17,964.11

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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.