Home / 12,938.08-17,855.28-9,788.80

Finding the Fourth Proportional to 12,938.08, 17,855.28 and 9,788.80

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Solution

The fourth proportional to 12,938.08, 17,855.28 and 9,788.80 is: 13,509.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.08 : 17,855.28 = 9,788.80 : x
  2. Step 2: Convert to fraction form
    12,938.08/17,855.28 = 9,788.80/x
  3. Step 3: Cross multiply
    12,938.08x = 17,855.28 × 9,788.80
  4. Step 4: Simplify right side
    12,938.08x = 174,781,764.86
  5. Step 5: Solve for x
    x = 174,781,764.86/12,938.08
  6. Step 6: Final answer
    x = 13,509.10

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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.