Home / 21,870.74-30,181.28-12,802.34

Finding the Fourth Proportional to 21,870.74, 30,181.28 and 12,802.34

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Solution

The fourth proportional to 21,870.74, 30,181.28 and 12,802.34 is: 17,667.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.74 : 30,181.28 = 12,802.34 : x
  2. Step 2: Convert to fraction form
    21,870.74/30,181.28 = 12,802.34/x
  3. Step 3: Cross multiply
    21,870.74x = 30,181.28 × 12,802.34
  4. Step 4: Simplify right side
    21,870.74x = 386,391,115.65
  5. Step 5: Solve for x
    x = 386,391,115.65/21,870.74
  6. Step 6: Final answer
    x = 17,667.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.