Home / 20,507.20-28,238.88-19,018.70

Finding the Fourth Proportional to 20,507.20, 28,238.88 and 19,018.70

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Solution

The fourth proportional to 20,507.20, 28,238.88 and 19,018.70 is: 26,189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.20 : 28,238.88 = 19,018.70 : x
  2. Step 2: Convert to fraction form
    20,507.20/28,238.88 = 19,018.70/x
  3. Step 3: Cross multiply
    20,507.20x = 28,238.88 × 19,018.70
  4. Step 4: Simplify right side
    20,507.20x = 537,066,787.06
  5. Step 5: Solve for x
    x = 537,066,787.06/20,507.20
  6. Step 6: Final answer
    x = 26,189.18

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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.