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Finding the Fourth Proportional to 15,779.60, 23,660.40 and 5,919.20

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Solution

The fourth proportional to 15,779.60, 23,660.40 and 5,919.20 is: 8,875.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.60 : 23,660.40 = 5,919.20 : x
  2. Step 2: Convert to fraction form
    15,779.60/23,660.40 = 5,919.20/x
  3. Step 3: Cross multiply
    15,779.60x = 23,660.40 × 5,919.20
  4. Step 4: Simplify right side
    15,779.60x = 140,050,639.68
  5. Step 5: Solve for x
    x = 140,050,639.68/15,779.60
  6. Step 6: Final answer
    x = 8,875.42

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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.