Home / 20,509.98-28,305.77-12,011.57

Finding the Fourth Proportional to 20,509.98, 28,305.77 and 12,011.57

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Solution

The fourth proportional to 20,509.98, 28,305.77 and 12,011.57 is: 16,577.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.98 : 28,305.77 = 12,011.57 : x
  2. Step 2: Convert to fraction form
    20,509.98/28,305.77 = 12,011.57/x
  3. Step 3: Cross multiply
    20,509.98x = 28,305.77 × 12,011.57
  4. Step 4: Simplify right side
    20,509.98x = 339,996,737.76
  5. Step 5: Solve for x
    x = 339,996,737.76/20,509.98
  6. Step 6: Final answer
    x = 16,577.14

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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.