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Finding the Fourth Proportional to 15,075.88, 20,801.54 and 9,106.38

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Solution

The fourth proportional to 15,075.88, 20,801.54 and 9,106.38 is: 12,564.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.88 : 20,801.54 = 9,106.38 : x
  2. Step 2: Convert to fraction form
    15,075.88/20,801.54 = 9,106.38/x
  3. Step 3: Cross multiply
    15,075.88x = 20,801.54 × 9,106.38
  4. Step 4: Simplify right side
    15,075.88x = 189,426,750.59
  5. Step 5: Solve for x
    x = 189,426,750.59/15,075.88
  6. Step 6: Final answer
    x = 12,564.89

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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.