Home / 20,470.37-30,686.38-18,644.36

Finding the Fourth Proportional to 20,470.37, 30,686.38 and 18,644.36

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Solution

The fourth proportional to 20,470.37, 30,686.38 and 18,644.36 is: 27,949.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.37 : 30,686.38 = 18,644.36 : x
  2. Step 2: Convert to fraction form
    20,470.37/30,686.38 = 18,644.36/x
  3. Step 3: Cross multiply
    20,470.37x = 30,686.38 × 18,644.36
  4. Step 4: Simplify right side
    20,470.37x = 572,127,915.82
  5. Step 5: Solve for x
    x = 572,127,915.82/20,470.37
  6. Step 6: Final answer
    x = 27,949.08

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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.