Home / 15,855.75-21,870.81-10,188.59

Finding the Fourth Proportional to 15,855.75, 21,870.81 and 10,188.59

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Solution

The fourth proportional to 15,855.75, 21,870.81 and 10,188.59 is: 14,053.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.75 : 21,870.81 = 10,188.59 : x
  2. Step 2: Convert to fraction form
    15,855.75/21,870.81 = 10,188.59/x
  3. Step 3: Cross multiply
    15,855.75x = 21,870.81 × 10,188.59
  4. Step 4: Simplify right side
    15,855.75x = 222,832,606.70
  5. Step 5: Solve for x
    x = 222,832,606.70/15,855.75
  6. Step 6: Final answer
    x = 14,053.74

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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.