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Finding the Fourth Proportional to 15,075.78, 20,801.25 and 8,701.02

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Solution

The fourth proportional to 15,075.78, 20,801.25 and 8,701.02 is: 12,005.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.78 : 20,801.25 = 8,701.02 : x
  2. Step 2: Convert to fraction form
    15,075.78/20,801.25 = 8,701.02/x
  3. Step 3: Cross multiply
    15,075.78x = 20,801.25 × 8,701.02
  4. Step 4: Simplify right side
    15,075.78x = 180,991,981.64
  5. Step 5: Solve for x
    x = 180,991,981.64/15,075.78
  6. Step 6: Final answer
    x = 12,005.48

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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.