Home / 15,531.15-21,429.69-10,161.45

Finding the Fourth Proportional to 15,531.15, 21,429.69 and 10,161.45

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Solution

The fourth proportional to 15,531.15, 21,429.69 and 10,161.45 is: 14,020.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.15 : 21,429.69 = 10,161.45 : x
  2. Step 2: Convert to fraction form
    15,531.15/21,429.69 = 10,161.45/x
  3. Step 3: Cross multiply
    15,531.15x = 21,429.69 × 10,161.45
  4. Step 4: Simplify right side
    15,531.15x = 217,756,723.45
  5. Step 5: Solve for x
    x = 217,756,723.45/15,531.15
  6. Step 6: Final answer
    x = 14,020.64

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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.