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Finding the Fourth Proportional to 15,075.96, 20,811.68 and 9,700.95

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Solution

The fourth proportional to 15,075.96, 20,811.68 and 9,700.95 is: 13,391.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.96 : 20,811.68 = 9,700.95 : x
  2. Step 2: Convert to fraction form
    15,075.96/20,811.68 = 9,700.95/x
  3. Step 3: Cross multiply
    15,075.96x = 20,811.68 × 9,700.95
  4. Step 4: Simplify right side
    15,075.96x = 201,893,018.59
  5. Step 5: Solve for x
    x = 201,893,018.59/15,075.96
  6. Step 6: Final answer
    x = 13,391.72

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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.