Home / 20,871.43-31,309.08-7,547.76

Finding the Fourth Proportional to 20,871.43, 31,309.08 and 7,547.76

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Solution

The fourth proportional to 20,871.43, 31,309.08 and 7,547.76 is: 11,322.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.43 : 31,309.08 = 7,547.76 : x
  2. Step 2: Convert to fraction form
    20,871.43/31,309.08 = 7,547.76/x
  3. Step 3: Cross multiply
    20,871.43x = 31,309.08 × 7,547.76
  4. Step 4: Simplify right side
    20,871.43x = 236,313,421.66
  5. Step 5: Solve for x
    x = 236,313,421.66/20,871.43
  6. Step 6: Final answer
    x = 11,322.34

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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.