Home / 15,503.80-21,396.72-8,789.74

Finding the Fourth Proportional to 15,503.80, 21,396.72 and 8,789.74

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Solution

The fourth proportional to 15,503.80, 21,396.72 and 8,789.74 is: 12,130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.80 : 21,396.72 = 8,789.74 : x
  2. Step 2: Convert to fraction form
    15,503.80/21,396.72 = 8,789.74/x
  3. Step 3: Cross multiply
    15,503.80x = 21,396.72 × 8,789.74
  4. Step 4: Simplify right side
    15,503.80x = 188,071,605.65
  5. Step 5: Solve for x
    x = 188,071,605.65/15,503.80
  6. Step 6: Final answer
    x = 12,130.68

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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.