Home / 21,862.05-30,164.45-12,435.81

Finding the Fourth Proportional to 21,862.05, 30,164.45 and 12,435.81

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Solution

The fourth proportional to 21,862.05, 30,164.45 and 12,435.81 is: 17,158.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.05 : 30,164.45 = 12,435.81 : x
  2. Step 2: Convert to fraction form
    21,862.05/30,164.45 = 12,435.81/x
  3. Step 3: Cross multiply
    21,862.05x = 30,164.45 × 12,435.81
  4. Step 4: Simplify right side
    21,862.05x = 375,119,306.78
  5. Step 5: Solve for x
    x = 375,119,306.78/21,862.05
  6. Step 6: Final answer
    x = 17,158.47

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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.