Home / 15,011.05-20,715.31-8,205.21

Finding the Fourth Proportional to 15,011.05, 20,715.31 and 8,205.21

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Solution

The fourth proportional to 15,011.05, 20,715.31 and 8,205.21 is: 11,323.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.05 : 20,715.31 = 8,205.21 : x
  2. Step 2: Convert to fraction form
    15,011.05/20,715.31 = 8,205.21/x
  3. Step 3: Cross multiply
    15,011.05x = 20,715.31 × 8,205.21
  4. Step 4: Simplify right side
    15,011.05x = 169,973,468.77
  5. Step 5: Solve for x
    x = 169,973,468.77/15,011.05
  6. Step 6: Final answer
    x = 11,323.22

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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.