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Finding the Fourth Proportional to 28,437.35, 42,692.90 and 21,868.11

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Solution

The fourth proportional to 28,437.35, 42,692.90 and 21,868.11 is: 32,830.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.35 : 42,692.90 = 21,868.11 : x
  2. Step 2: Convert to fraction form
    28,437.35/42,692.90 = 21,868.11/x
  3. Step 3: Cross multiply
    28,437.35x = 42,692.90 × 21,868.11
  4. Step 4: Simplify right side
    28,437.35x = 933,612,924.08
  5. Step 5: Solve for x
    x = 933,612,924.08/28,437.35
  6. Step 6: Final answer
    x = 32,830.52

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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.