Home / 15,779.20-21,775.48-8,705.88

Finding the Fourth Proportional to 15,779.20, 21,775.48 and 8,705.88

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Solution

The fourth proportional to 15,779.20, 21,775.48 and 8,705.88 is: 12,014.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.20 : 21,775.48 = 8,705.88 : x
  2. Step 2: Convert to fraction form
    15,779.20/21,775.48 = 8,705.88/x
  3. Step 3: Cross multiply
    15,779.20x = 21,775.48 × 8,705.88
  4. Step 4: Simplify right side
    15,779.20x = 189,574,715.82
  5. Step 5: Solve for x
    x = 189,574,715.82/15,779.20
  6. Step 6: Final answer
    x = 12,014.22

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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.