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Finding the Fourth Proportional to 27,307.80, 40,961.70 and 18,970.20

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Solution

The fourth proportional to 27,307.80, 40,961.70 and 18,970.20 is: 28,455.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,307.80 : 40,961.70 = 18,970.20 : x
  2. Step 2: Convert to fraction form
    27,307.80/40,961.70 = 18,970.20/x
  3. Step 3: Cross multiply
    27,307.80x = 40,961.70 × 18,970.20
  4. Step 4: Simplify right side
    27,307.80x = 777,051,641.34
  5. Step 5: Solve for x
    x = 777,051,641.34/27,307.80
  6. Step 6: Final answer
    x = 28,455.30

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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.