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Finding the Fourth Proportional to 19,916.68, 27,485.80 and 10,965.01

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Solution

The fourth proportional to 19,916.68, 27,485.80 and 10,965.01 is: 15,132.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,916.68 : 27,485.80 = 10,965.01 : x
  2. Step 2: Convert to fraction form
    19,916.68/27,485.80 = 10,965.01/x
  3. Step 3: Cross multiply
    19,916.68x = 27,485.80 × 10,965.01
  4. Step 4: Simplify right side
    19,916.68x = 301,382,104.57
  5. Step 5: Solve for x
    x = 301,382,104.57/19,916.68
  6. Step 6: Final answer
    x = 15,132.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.