Home / 20,570.09-30,848.76-7,420.76

Finding the Fourth Proportional to 20,570.09, 30,848.76 and 7,420.76

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Solution

The fourth proportional to 20,570.09, 30,848.76 and 7,420.76 is: 11,128.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.09 : 30,848.76 = 7,420.76 : x
  2. Step 2: Convert to fraction form
    20,570.09/30,848.76 = 7,420.76/x
  3. Step 3: Cross multiply
    20,570.09x = 30,848.76 × 7,420.76
  4. Step 4: Simplify right side
    20,570.09x = 228,921,090.01
  5. Step 5: Solve for x
    x = 228,921,090.01/20,570.09
  6. Step 6: Final answer
    x = 11,128.83

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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.