Home / 21,390.84-32,107.32-13,605.12

Finding the Fourth Proportional to 21,390.84, 32,107.32 and 13,605.12

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Solution

The fourth proportional to 21,390.84, 32,107.32 and 13,605.12 is: 20,421.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.84 : 32,107.32 = 13,605.12 : x
  2. Step 2: Convert to fraction form
    21,390.84/32,107.32 = 13,605.12/x
  3. Step 3: Cross multiply
    21,390.84x = 32,107.32 × 13,605.12
  4. Step 4: Simplify right side
    21,390.84x = 436,823,941.48
  5. Step 5: Solve for x
    x = 436,823,941.48/21,390.84
  6. Step 6: Final answer
    x = 20,421.07

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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.