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Finding the Fourth Proportional to 20,881.69, 31,327.40 and 7,030.69

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Solution

The fourth proportional to 20,881.69, 31,327.40 and 7,030.69 is: 10,547.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.69 : 31,327.40 = 7,030.69 : x
  2. Step 2: Convert to fraction form
    20,881.69/31,327.40 = 7,030.69/x
  3. Step 3: Cross multiply
    20,881.69x = 31,327.40 × 7,030.69
  4. Step 4: Simplify right side
    20,881.69x = 220,253,177.16
  5. Step 5: Solve for x
    x = 220,253,177.16/20,881.69
  6. Step 6: Final answer
    x = 10,547.67

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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.