Home / 21,055.60-31,525.84-13,641.76

Finding the Fourth Proportional to 21,055.60, 31,525.84 and 13,641.76

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Solution

The fourth proportional to 21,055.60, 31,525.84 and 13,641.76 is: 20,425.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.60 : 31,525.84 = 13,641.76 : x
  2. Step 2: Convert to fraction form
    21,055.60/31,525.84 = 13,641.76/x
  3. Step 3: Cross multiply
    21,055.60x = 31,525.84 × 13,641.76
  4. Step 4: Simplify right side
    21,055.60x = 430,067,943.08
  5. Step 5: Solve for x
    x = 430,067,943.08/21,055.60
  6. Step 6: Final answer
    x = 20,425.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.