Home / 20,470.61-28,252.85-11,855.55

Finding the Fourth Proportional to 20,470.61, 28,252.85 and 11,855.55

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Solution

The fourth proportional to 20,470.61, 28,252.85 and 11,855.55 is: 16,362.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.61 : 28,252.85 = 11,855.55 : x
  2. Step 2: Convert to fraction form
    20,470.61/28,252.85 = 11,855.55/x
  3. Step 3: Cross multiply
    20,470.61x = 28,252.85 × 11,855.55
  4. Step 4: Simplify right side
    20,470.61x = 334,953,075.82
  5. Step 5: Solve for x
    x = 334,953,075.82/20,470.61
  6. Step 6: Final answer
    x = 16,362.63

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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.