Home / 15,870.28-21,891.09-10,212.40

Finding the Fourth Proportional to 15,870.28, 21,891.09 and 10,212.40

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Solution

The fourth proportional to 15,870.28, 21,891.09 and 10,212.40 is: 14,086.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.28 : 21,891.09 = 10,212.40 : x
  2. Step 2: Convert to fraction form
    15,870.28/21,891.09 = 10,212.40/x
  3. Step 3: Cross multiply
    15,870.28x = 21,891.09 × 10,212.40
  4. Step 4: Simplify right side
    15,870.28x = 223,560,567.52
  5. Step 5: Solve for x
    x = 223,560,567.52/15,870.28
  6. Step 6: Final answer
    x = 14,086.74

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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.