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Finding the Fourth Proportional to 18,729.55, 28,075.93 and 9,355.52

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Solution

The fourth proportional to 18,729.55, 28,075.93 and 9,355.52 is: 14,024.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729.55 : 28,075.93 = 9,355.52 : x
  2. Step 2: Convert to fraction form
    18,729.55/28,075.93 = 9,355.52/x
  3. Step 3: Cross multiply
    18,729.55x = 28,075.93 × 9,355.52
  4. Step 4: Simplify right side
    18,729.55x = 262,664,924.63
  5. Step 5: Solve for x
    x = 262,664,924.63/18,729.55
  6. Step 6: Final answer
    x = 14,024.09

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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.