Home / 19,779.48-29,669.22-7,938.72

Finding the Fourth Proportional to 19,779.48, 29,669.22 and 7,938.72

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Solution

The fourth proportional to 19,779.48, 29,669.22 and 7,938.72 is: 11,908.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.48 : 29,669.22 = 7,938.72 : x
  2. Step 2: Convert to fraction form
    19,779.48/29,669.22 = 7,938.72/x
  3. Step 3: Cross multiply
    19,779.48x = 29,669.22 × 7,938.72
  4. Step 4: Simplify right side
    19,779.48x = 235,535,630.20
  5. Step 5: Solve for x
    x = 235,535,630.20/19,779.48
  6. Step 6: Final answer
    x = 11,908.08

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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.