Home / 19,140.60-28,710.90-13,235.70

Finding the Fourth Proportional to 19,140.60, 28,710.90 and 13,235.70

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Solution

The fourth proportional to 19,140.60, 28,710.90 and 13,235.70 is: 19,853.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.60 : 28,710.90 = 13,235.70 : x
  2. Step 2: Convert to fraction form
    19,140.60/28,710.90 = 13,235.70/x
  3. Step 3: Cross multiply
    19,140.60x = 28,710.90 × 13,235.70
  4. Step 4: Simplify right side
    19,140.60x = 380,008,859.13
  5. Step 5: Solve for x
    x = 380,008,859.13/19,140.60
  6. Step 6: Final answer
    x = 19,853.55

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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.