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Finding the Fourth Proportional to 27,348.90, 40,987.80 and 12,345

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Solution

The fourth proportional to 27,348.90, 40,987.80 and 12,345 is: 18,501.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,348.90 : 40,987.80 = 12,345 : x
  2. Step 2: Convert to fraction form
    27,348.90/40,987.80 = 12,345/x
  3. Step 3: Cross multiply
    27,348.90x = 40,987.80 × 12,345
  4. Step 4: Simplify right side
    27,348.90x = 505,994,391.00
  5. Step 5: Solve for x
    x = 505,994,391.00/27,348.90
  6. Step 6: Final answer
    x = 18,501.45

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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.