Home / 20,939.21-31,565.75-19,547.28

Finding the Fourth Proportional to 20,939.21, 31,565.75 and 19,547.28

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Solution

The fourth proportional to 20,939.21, 31,565.75 and 19,547.28 is: 29,467.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.21 : 31,565.75 = 19,547.28 : x
  2. Step 2: Convert to fraction form
    20,939.21/31,565.75 = 19,547.28/x
  3. Step 3: Cross multiply
    20,939.21x = 31,565.75 × 19,547.28
  4. Step 4: Simplify right side
    20,939.21x = 617,024,455.92
  5. Step 5: Solve for x
    x = 617,024,455.92/20,939.21
  6. Step 6: Final answer
    x = 29,467.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.