Home / 21,779.60-30,012.84-15,474.32

Finding the Fourth Proportional to 21,779.60, 30,012.84 and 15,474.32

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Solution

The fourth proportional to 21,779.60, 30,012.84 and 15,474.32 is: 21,324.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.60 : 30,012.84 = 15,474.32 : x
  2. Step 2: Convert to fraction form
    21,779.60/30,012.84 = 15,474.32/x
  3. Step 3: Cross multiply
    21,779.60x = 30,012.84 × 15,474.32
  4. Step 4: Simplify right side
    21,779.60x = 464,428,290.27
  5. Step 5: Solve for x
    x = 464,428,290.27/21,779.60
  6. Step 6: Final answer
    x = 21,324.00

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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.