Home / 19,889.62-27,442.06-12,820.13

Finding the Fourth Proportional to 19,889.62, 27,442.06 and 12,820.13

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Solution

The fourth proportional to 19,889.62, 27,442.06 and 12,820.13 is: 17,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.62 : 27,442.06 = 12,820.13 : x
  2. Step 2: Convert to fraction form
    19,889.62/27,442.06 = 12,820.13/x
  3. Step 3: Cross multiply
    19,889.62x = 27,442.06 × 12,820.13
  4. Step 4: Simplify right side
    19,889.62x = 351,810,776.67
  5. Step 5: Solve for x
    x = 351,810,776.67/19,889.62
  6. Step 6: Final answer
    x = 17,688.16

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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.