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Finding the Fourth Proportional to 12,395.71, 17,070.85 and 10,903.15

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Solution

The fourth proportional to 12,395.71, 17,070.85 and 10,903.15 is: 15,015.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,395.71 : 17,070.85 = 10,903.15 : x
  2. Step 2: Convert to fraction form
    12,395.71/17,070.85 = 10,903.15/x
  3. Step 3: Cross multiply
    12,395.71x = 17,070.85 × 10,903.15
  4. Step 4: Simplify right side
    12,395.71x = 186,126,038.18
  5. Step 5: Solve for x
    x = 186,126,038.18/12,395.71
  6. Step 6: Final answer
    x = 15,015.36

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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.