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Finding the Fourth Proportional to 8,886.51, 13,382.49 and 7,913.30

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Solution

The fourth proportional to 8,886.51, 13,382.49 and 7,913.30 is: 11,916.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,886.51 : 13,382.49 = 7,913.30 : x
  2. Step 2: Convert to fraction form
    8,886.51/13,382.49 = 7,913.30/x
  3. Step 3: Cross multiply
    8,886.51x = 13,382.49 × 7,913.30
  4. Step 4: Simplify right side
    8,886.51x = 105,899,598.62
  5. Step 5: Solve for x
    x = 105,899,598.62/8,886.51
  6. Step 6: Final answer
    x = 11,916.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.