Home / 12,779.40-19,176.30-4,987.20

Finding the Fourth Proportional to 12,779.40, 19,176.30 and 4,987.20

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Solution

The fourth proportional to 12,779.40, 19,176.30 and 4,987.20 is: 7,483.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.40 : 19,176.30 = 4,987.20 : x
  2. Step 2: Convert to fraction form
    12,779.40/19,176.30 = 4,987.20/x
  3. Step 3: Cross multiply
    12,779.40x = 19,176.30 × 4,987.20
  4. Step 4: Simplify right side
    12,779.40x = 95,636,043.36
  5. Step 5: Solve for x
    x = 95,636,043.36/12,779.40
  6. Step 6: Final answer
    x = 7,483.61

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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.