Home / 20,281.07-30,420.08-7,133.55

Finding the Fourth Proportional to 20,281.07, 30,420.08 and 7,133.55

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Solution

The fourth proportional to 20,281.07, 30,420.08 and 7,133.55 is: 10,699.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.07 : 30,420.08 = 7,133.55 : x
  2. Step 2: Convert to fraction form
    20,281.07/30,420.08 = 7,133.55/x
  3. Step 3: Cross multiply
    20,281.07x = 30,420.08 × 7,133.55
  4. Step 4: Simplify right side
    20,281.07x = 217,003,126.02
  5. Step 5: Solve for x
    x = 217,003,126.02/20,281.07
  6. Step 6: Final answer
    x = 10,699.79

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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.