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Finding the Fourth Proportional to 28,074.55, 42,075.30 and 11,415.16

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Solution

The fourth proportional to 28,074.55, 42,075.30 and 11,415.16 is: 17,107.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,074.55 : 42,075.30 = 11,415.16 : x
  2. Step 2: Convert to fraction form
    28,074.55/42,075.30 = 11,415.16/x
  3. Step 3: Cross multiply
    28,074.55x = 42,075.30 × 11,415.16
  4. Step 4: Simplify right side
    28,074.55x = 480,296,281.55
  5. Step 5: Solve for x
    x = 480,296,281.55/28,074.55
  6. Step 6: Final answer
    x = 17,107.89

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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.