Home / 21,875.91-30,191.63-12,442.65

Finding the Fourth Proportional to 21,875.91, 30,191.63 and 12,442.65

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Solution

The fourth proportional to 21,875.91, 30,191.63 and 12,442.65 is: 17,172.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.91 : 30,191.63 = 12,442.65 : x
  2. Step 2: Convert to fraction form
    21,875.91/30,191.63 = 12,442.65/x
  3. Step 3: Cross multiply
    21,875.91x = 30,191.63 × 12,442.65
  4. Step 4: Simplify right side
    21,875.91x = 375,663,885.02
  5. Step 5: Solve for x
    x = 375,663,885.02/21,875.91
  6. Step 6: Final answer
    x = 17,172.49

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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.