Home / 12,275.07-18,421.75-4,779.81

Finding the Fourth Proportional to 12,275.07, 18,421.75 and 4,779.81

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Solution

The fourth proportional to 12,275.07, 18,421.75 and 4,779.81 is: 7,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,275.07 : 18,421.75 = 4,779.81 : x
  2. Step 2: Convert to fraction form
    12,275.07/18,421.75 = 4,779.81/x
  3. Step 3: Cross multiply
    12,275.07x = 18,421.75 × 4,779.81
  4. Step 4: Simplify right side
    12,275.07x = 88,052,484.29
  5. Step 5: Solve for x
    x = 88,052,484.29/12,275.07
  6. Step 6: Final answer
    x = 7,173.28

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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.