Home / 20,678.19-30,783.43-20,555.17

Finding the Fourth Proportional to 20,678.19, 30,783.43 and 20,555.17

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Solution

The fourth proportional to 20,678.19, 30,783.43 and 20,555.17 is: 30,600.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.19 : 30,783.43 = 20,555.17 : x
  2. Step 2: Convert to fraction form
    20,678.19/30,783.43 = 20,555.17/x
  3. Step 3: Cross multiply
    20,678.19x = 30,783.43 × 20,555.17
  4. Step 4: Simplify right side
    20,678.19x = 632,758,585.57
  5. Step 5: Solve for x
    x = 632,758,585.57/20,678.19
  6. Step 6: Final answer
    x = 30,600.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.