Home / 20,456.08-28,235.28-12,075.28

Finding the Fourth Proportional to 20,456.08, 28,235.28 and 12,075.28

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Solution

The fourth proportional to 20,456.08, 28,235.28 and 12,075.28 is: 16,667.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.08 : 28,235.28 = 12,075.28 : x
  2. Step 2: Convert to fraction form
    20,456.08/28,235.28 = 12,075.28/x
  3. Step 3: Cross multiply
    20,456.08x = 28,235.28 × 12,075.28
  4. Step 4: Simplify right side
    20,456.08x = 340,948,911.88
  5. Step 5: Solve for x
    x = 340,948,911.88/20,456.08
  6. Step 6: Final answer
    x = 16,667.36

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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.