Home / 28,693.35-39,585.72-21,157.53

Finding the Fourth Proportional to 28,693.35, 39,585.72 and 21,157.53

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Solution

The fourth proportional to 28,693.35, 39,585.72 and 21,157.53 is: 29,189.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,693.35 : 39,585.72 = 21,157.53 : x
  2. Step 2: Convert to fraction form
    28,693.35/39,585.72 = 21,157.53/x
  3. Step 3: Cross multiply
    28,693.35x = 39,585.72 × 21,157.53
  4. Step 4: Simplify right side
    28,693.35x = 837,536,058.47
  5. Step 5: Solve for x
    x = 837,536,058.47/28,693.35
  6. Step 6: Final answer
    x = 29,189.20

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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.