Home / 19,989-27,559.18-16,390.70

Finding the Fourth Proportional to 19,989, 27,559.18 and 16,390.70

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Solution

The fourth proportional to 19,989, 27,559.18 and 16,390.70 is: 22,598.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989 : 27,559.18 = 16,390.70 : x
  2. Step 2: Convert to fraction form
    19,989/27,559.18 = 16,390.70/x
  3. Step 3: Cross multiply
    19,989x = 27,559.18 × 16,390.70
  4. Step 4: Simplify right side
    19,989x = 451,714,251.63
  5. Step 5: Solve for x
    x = 451,714,251.63/19,989
  6. Step 6: Final answer
    x = 22,598.14

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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.