Home / 19,779.30-29,668.66-4,988.12

Finding the Fourth Proportional to 19,779.30, 29,668.66 and 4,988.12

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Solution

The fourth proportional to 19,779.30, 29,668.66 and 4,988.12 is: 7,482.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.30 : 29,668.66 = 4,988.12 : x
  2. Step 2: Convert to fraction form
    19,779.30/29,668.66 = 4,988.12/x
  3. Step 3: Cross multiply
    19,779.30x = 29,668.66 × 4,988.12
  4. Step 4: Simplify right side
    19,779.30x = 147,990,836.32
  5. Step 5: Solve for x
    x = 147,990,836.32/19,779.30
  6. Step 6: Final answer
    x = 7,482.11

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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.