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Finding the Fourth Proportional to 19,309.79, 26,650.02 and 10,815.15

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Solution

The fourth proportional to 19,309.79, 26,650.02 and 10,815.15 is: 14,926.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.79 : 26,650.02 = 10,815.15 : x
  2. Step 2: Convert to fraction form
    19,309.79/26,650.02 = 10,815.15/x
  3. Step 3: Cross multiply
    19,309.79x = 26,650.02 × 10,815.15
  4. Step 4: Simplify right side
    19,309.79x = 288,223,963.80
  5. Step 5: Solve for x
    x = 288,223,963.80/19,309.79
  6. Step 6: Final answer
    x = 14,926.32

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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.