Home / 28,528.16-39,344.96-21,374.88

Finding the Fourth Proportional to 28,528.16, 39,344.96 and 21,374.88

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Solution

The fourth proportional to 28,528.16, 39,344.96 and 21,374.88 is: 29,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,528.16 : 39,344.96 = 21,374.88 : x
  2. Step 2: Convert to fraction form
    28,528.16/39,344.96 = 21,374.88/x
  3. Step 3: Cross multiply
    28,528.16x = 39,344.96 × 21,374.88
  4. Step 4: Simplify right side
    28,528.16x = 840,993,798.60
  5. Step 5: Solve for x
    x = 840,993,798.60/28,528.16
  6. Step 6: Final answer
    x = 29,479.43

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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.