Home / 28,355.64-39,129.12-16,418.13

Finding the Fourth Proportional to 28,355.64, 39,129.12 and 16,418.13

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Solution

The fourth proportional to 28,355.64, 39,129.12 and 16,418.13 is: 22,656.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.64 : 39,129.12 = 16,418.13 : x
  2. Step 2: Convert to fraction form
    28,355.64/39,129.12 = 16,418.13/x
  3. Step 3: Cross multiply
    28,355.64x = 39,129.12 × 16,418.13
  4. Step 4: Simplify right side
    28,355.64x = 642,426,978.95
  5. Step 5: Solve for x
    x = 642,426,978.95/28,355.64
  6. Step 6: Final answer
    x = 22,656.06

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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.