Home / 28,135.20-38,818.80-19,628.16

Finding the Fourth Proportional to 28,135.20, 38,818.80 and 19,628.16

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Solution

The fourth proportional to 28,135.20, 38,818.80 and 19,628.16 is: 27,081.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.20 : 38,818.80 = 19,628.16 : x
  2. Step 2: Convert to fraction form
    28,135.20/38,818.80 = 19,628.16/x
  3. Step 3: Cross multiply
    28,135.20x = 38,818.80 × 19,628.16
  4. Step 4: Simplify right side
    28,135.20x = 761,941,617.41
  5. Step 5: Solve for x
    x = 761,941,617.41/28,135.20
  6. Step 6: Final answer
    x = 27,081.44

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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.