Home / 19,779.60-29,669.40-18,904.80

Finding the Fourth Proportional to 19,779.60, 29,669.40 and 18,904.80

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Solution

The fourth proportional to 19,779.60, 29,669.40 and 18,904.80 is: 28,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.60 : 29,669.40 = 18,904.80 : x
  2. Step 2: Convert to fraction form
    19,779.60/29,669.40 = 18,904.80/x
  3. Step 3: Cross multiply
    19,779.60x = 29,669.40 × 18,904.80
  4. Step 4: Simplify right side
    19,779.60x = 560,894,073.12
  5. Step 5: Solve for x
    x = 560,894,073.12/19,779.60
  6. Step 6: Final answer
    x = 28,357.20

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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.