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Finding the Fourth Proportional to 20,754.76, 28,652.16 and 14,075.68

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Solution

The fourth proportional to 20,754.76, 28,652.16 and 14,075.68 is: 19,431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.76 : 28,652.16 = 14,075.68 : x
  2. Step 2: Convert to fraction form
    20,754.76/28,652.16 = 14,075.68/x
  3. Step 3: Cross multiply
    20,754.76x = 28,652.16 × 14,075.68
  4. Step 4: Simplify right side
    20,754.76x = 403,298,635.47
  5. Step 5: Solve for x
    x = 403,298,635.47/20,754.76
  6. Step 6: Final answer
    x = 19,431.62

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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.