Home / 21,787.04-30,069.56-13,291.02

Finding the Fourth Proportional to 21,787.04, 30,069.56 and 13,291.02

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Solution

The fourth proportional to 21,787.04, 30,069.56 and 13,291.02 is: 18,343.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.04 : 30,069.56 = 13,291.02 : x
  2. Step 2: Convert to fraction form
    21,787.04/30,069.56 = 13,291.02/x
  3. Step 3: Cross multiply
    21,787.04x = 30,069.56 × 13,291.02
  4. Step 4: Simplify right side
    21,787.04x = 399,655,156.58
  5. Step 5: Solve for x
    x = 399,655,156.58/21,787.04
  6. Step 6: Final answer
    x = 18,343.71

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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.