Home / 15,779.18-21,776.80-11,793.36

Finding the Fourth Proportional to 15,779.18, 21,776.80 and 11,793.36

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Solution

The fourth proportional to 15,779.18, 21,776.80 and 11,793.36 is: 16,275.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.18 : 21,776.80 = 11,793.36 : x
  2. Step 2: Convert to fraction form
    15,779.18/21,776.80 = 11,793.36/x
  3. Step 3: Cross multiply
    15,779.18x = 21,776.80 × 11,793.36
  4. Step 4: Simplify right side
    15,779.18x = 256,821,642.05
  5. Step 5: Solve for x
    x = 256,821,642.05/15,779.18
  6. Step 6: Final answer
    x = 16,275.98

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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.