Home / 14,289.16-21,407.82-13,978.12

Finding the Fourth Proportional to 14,289.16, 21,407.82 and 13,978.12

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Solution

The fourth proportional to 14,289.16, 21,407.82 and 13,978.12 is: 20,941.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,289.16 : 21,407.82 = 13,978.12 : x
  2. Step 2: Convert to fraction form
    14,289.16/21,407.82 = 13,978.12/x
  3. Step 3: Cross multiply
    14,289.16x = 21,407.82 × 13,978.12
  4. Step 4: Simplify right side
    14,289.16x = 299,241,076.90
  5. Step 5: Solve for x
    x = 299,241,076.90/14,289.16
  6. Step 6: Final answer
    x = 20,941.82

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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.