Home / 21,869.80-30,178.02-12,436.84

Finding the Fourth Proportional to 21,869.80, 30,178.02 and 12,436.84

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Solution

The fourth proportional to 21,869.80, 30,178.02 and 12,436.84 is: 17,161.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.80 : 30,178.02 = 12,436.84 : x
  2. Step 2: Convert to fraction form
    21,869.80/30,178.02 = 12,436.84/x
  3. Step 3: Cross multiply
    21,869.80x = 30,178.02 × 12,436.84
  4. Step 4: Simplify right side
    21,869.80x = 375,319,206.26
  5. Step 5: Solve for x
    x = 375,319,206.26/21,869.80
  6. Step 6: Final answer
    x = 17,161.53

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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.