Home / 15,779.04-21,772.68-8,972.40

Finding the Fourth Proportional to 15,779.04, 21,772.68 and 8,972.40

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Solution

The fourth proportional to 15,779.04, 21,772.68 and 8,972.40 is: 12,380.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.04 : 21,772.68 = 8,972.40 : x
  2. Step 2: Convert to fraction form
    15,779.04/21,772.68 = 8,972.40/x
  3. Step 3: Cross multiply
    15,779.04x = 21,772.68 × 8,972.40
  4. Step 4: Simplify right side
    15,779.04x = 195,353,194.03
  5. Step 5: Solve for x
    x = 195,353,194.03/15,779.04
  6. Step 6: Final answer
    x = 12,380.55

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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.