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Finding the Fourth Proportional to 26,642.04, 39,978.90 and 11,851.80

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Solution

The fourth proportional to 26,642.04, 39,978.90 and 11,851.80 is: 17,784.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,642.04 : 39,978.90 = 11,851.80 : x
  2. Step 2: Convert to fraction form
    26,642.04/39,978.90 = 11,851.80/x
  3. Step 3: Cross multiply
    26,642.04x = 39,978.90 × 11,851.80
  4. Step 4: Simplify right side
    26,642.04x = 473,821,927.02
  5. Step 5: Solve for x
    x = 473,821,927.02/26,642.04
  6. Step 6: Final answer
    x = 17,784.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.