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Finding the Fourth Proportional to 26,779.36, 36,978.24 and 18,839.20

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Solution

The fourth proportional to 26,779.36, 36,978.24 and 18,839.20 is: 26,014.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,779.36 : 36,978.24 = 18,839.20 : x
  2. Step 2: Convert to fraction form
    26,779.36/36,978.24 = 18,839.20/x
  3. Step 3: Cross multiply
    26,779.36x = 36,978.24 × 18,839.20
  4. Step 4: Simplify right side
    26,779.36x = 696,640,459.01
  5. Step 5: Solve for x
    x = 696,640,459.01/26,779.36
  6. Step 6: Final answer
    x = 26,014.08

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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.