Home / 12,909.10-19,339.35-6,647.80

Finding the Fourth Proportional to 12,909.10, 19,339.35 and 6,647.80

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Solution

The fourth proportional to 12,909.10, 19,339.35 and 6,647.80 is: 9,959.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.10 : 19,339.35 = 6,647.80 : x
  2. Step 2: Convert to fraction form
    12,909.10/19,339.35 = 6,647.80/x
  3. Step 3: Cross multiply
    12,909.10x = 19,339.35 × 6,647.80
  4. Step 4: Simplify right side
    12,909.10x = 128,564,130.93
  5. Step 5: Solve for x
    x = 128,564,130.93/12,909.10
  6. Step 6: Final answer
    x = 9,959.19

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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.