Home / 13,438.34-20,066.95-10,978.02

Finding the Fourth Proportional to 13,438.34, 20,066.95 and 10,978.02

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Solution

The fourth proportional to 13,438.34, 20,066.95 and 10,978.02 is: 16,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.34 : 20,066.95 = 10,978.02 : x
  2. Step 2: Convert to fraction form
    13,438.34/20,066.95 = 10,978.02/x
  3. Step 3: Cross multiply
    13,438.34x = 20,066.95 × 10,978.02
  4. Step 4: Simplify right side
    13,438.34x = 220,295,378.44
  5. Step 5: Solve for x
    x = 220,295,378.44/13,438.34
  6. Step 6: Final answer
    x = 16,393.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.