Home / 15,405.90-23,119.79-13,918.74

Finding the Fourth Proportional to 15,405.90, 23,119.79 and 13,918.74

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Solution

The fourth proportional to 15,405.90, 23,119.79 and 13,918.74 is: 20,887.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.90 : 23,119.79 = 13,918.74 : x
  2. Step 2: Convert to fraction form
    15,405.90/23,119.79 = 13,918.74/x
  3. Step 3: Cross multiply
    15,405.90x = 23,119.79 × 13,918.74
  4. Step 4: Simplify right side
    15,405.90x = 321,798,345.86
  5. Step 5: Solve for x
    x = 321,798,345.86/15,405.90
  6. Step 6: Final answer
    x = 20,887.99

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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.