Home / 21,281.12-31,920.96-5,698.64

Finding the Fourth Proportional to 21,281.12, 31,920.96 and 5,698.64

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Solution

The fourth proportional to 21,281.12, 31,920.96 and 5,698.64 is: 8,547.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.12 : 31,920.96 = 5,698.64 : x
  2. Step 2: Convert to fraction form
    21,281.12/31,920.96 = 5,698.64/x
  3. Step 3: Cross multiply
    21,281.12x = 31,920.96 × 5,698.64
  4. Step 4: Simplify right side
    21,281.12x = 181,906,059.49
  5. Step 5: Solve for x
    x = 181,906,059.49/21,281.12
  6. Step 6: Final answer
    x = 8,547.77

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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.