Home / 19,005.60-28,508.40-9,139.80

Finding the Fourth Proportional to 19,005.60, 28,508.40 and 9,139.80

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Solution

The fourth proportional to 19,005.60, 28,508.40 and 9,139.80 is: 13,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.60 : 28,508.40 = 9,139.80 : x
  2. Step 2: Convert to fraction form
    19,005.60/28,508.40 = 9,139.80/x
  3. Step 3: Cross multiply
    19,005.60x = 28,508.40 × 9,139.80
  4. Step 4: Simplify right side
    19,005.60x = 260,561,074.32
  5. Step 5: Solve for x
    x = 260,561,074.32/19,005.60
  6. Step 6: Final answer
    x = 13,709.70

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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.