Home / 20,570.53-30,849.40-7,421.19

Finding the Fourth Proportional to 20,570.53, 30,849.40 and 7,421.19

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Solution

The fourth proportional to 20,570.53, 30,849.40 and 7,421.19 is: 11,129.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.53 : 30,849.40 = 7,421.19 : x
  2. Step 2: Convert to fraction form
    20,570.53/30,849.40 = 7,421.19/x
  3. Step 3: Cross multiply
    20,570.53x = 30,849.40 × 7,421.19
  4. Step 4: Simplify right side
    20,570.53x = 228,939,258.79
  5. Step 5: Solve for x
    x = 228,939,258.79/20,570.53
  6. Step 6: Final answer
    x = 11,129.48

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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.