Home / 20,989.72-31,349.75-19,011.16

Finding the Fourth Proportional to 20,989.72, 31,349.75 and 19,011.16

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Solution

The fourth proportional to 20,989.72, 31,349.75 and 19,011.16 is: 28,394.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.72 : 31,349.75 = 19,011.16 : x
  2. Step 2: Convert to fraction form
    20,989.72/31,349.75 = 19,011.16/x
  3. Step 3: Cross multiply
    20,989.72x = 31,349.75 × 19,011.16
  4. Step 4: Simplify right side
    20,989.72x = 595,995,113.21
  5. Step 5: Solve for x
    x = 595,995,113.21/20,989.72
  6. Step 6: Final answer
    x = 28,394.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.