Home / 13,675.28-18,871.44-8,642.20

Finding the Fourth Proportional to 13,675.28, 18,871.44 and 8,642.20

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Solution

The fourth proportional to 13,675.28, 18,871.44 and 8,642.20 is: 11,925.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,675.28 : 18,871.44 = 8,642.20 : x
  2. Step 2: Convert to fraction form
    13,675.28/18,871.44 = 8,642.20/x
  3. Step 3: Cross multiply
    13,675.28x = 18,871.44 × 8,642.20
  4. Step 4: Simplify right side
    13,675.28x = 163,090,758.77
  5. Step 5: Solve for x
    x = 163,090,758.77/13,675.28
  6. Step 6: Final answer
    x = 11,925.95

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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.