Home / 28,100.32-42,171.23-13,309.23

Finding the Fourth Proportional to 28,100.32, 42,171.23 and 13,309.23

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Solution

The fourth proportional to 28,100.32, 42,171.23 and 13,309.23 is: 19,973.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.32 : 42,171.23 = 13,309.23 : x
  2. Step 2: Convert to fraction form
    28,100.32/42,171.23 = 13,309.23/x
  3. Step 3: Cross multiply
    28,100.32x = 42,171.23 × 13,309.23
  4. Step 4: Simplify right side
    28,100.32x = 561,266,599.45
  5. Step 5: Solve for x
    x = 561,266,599.45/28,100.32
  6. Step 6: Final answer
    x = 19,973.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.