Home / 12,618.68-17,420.04-9,779.63

Finding the Fourth Proportional to 12,618.68, 17,420.04 and 9,779.63

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Solution

The fourth proportional to 12,618.68, 17,420.04 and 9,779.63 is: 13,500.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.68 : 17,420.04 = 9,779.63 : x
  2. Step 2: Convert to fraction form
    12,618.68/17,420.04 = 9,779.63/x
  3. Step 3: Cross multiply
    12,618.68x = 17,420.04 × 9,779.63
  4. Step 4: Simplify right side
    12,618.68x = 170,361,458.69
  5. Step 5: Solve for x
    x = 170,361,458.69/12,618.68
  6. Step 6: Final answer
    x = 13,500.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.