Home / 20,995.05-31,492.88-5,412.68

Finding the Fourth Proportional to 20,995.05, 31,492.88 and 5,412.68

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Solution

The fourth proportional to 20,995.05, 31,492.88 and 5,412.68 is: 8,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.05 : 31,492.88 = 5,412.68 : x
  2. Step 2: Convert to fraction form
    20,995.05/31,492.88 = 5,412.68/x
  3. Step 3: Cross multiply
    20,995.05x = 31,492.88 × 5,412.68
  4. Step 4: Simplify right side
    20,995.05x = 170,460,881.72
  5. Step 5: Solve for x
    x = 170,460,881.72/20,995.05
  6. Step 6: Final answer
    x = 8,119.10

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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.