Home / 15,309.84-21,127.32-9,021.12

Finding the Fourth Proportional to 15,309.84, 21,127.32 and 9,021.12

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Solution

The fourth proportional to 15,309.84, 21,127.32 and 9,021.12 is: 12,448.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.84 : 21,127.32 = 9,021.12 : x
  2. Step 2: Convert to fraction form
    15,309.84/21,127.32 = 9,021.12/x
  3. Step 3: Cross multiply
    15,309.84x = 21,127.32 × 9,021.12
  4. Step 4: Simplify right side
    15,309.84x = 190,592,089.00
  5. Step 5: Solve for x
    x = 190,592,089.00/15,309.84
  6. Step 6: Final answer
    x = 12,448.99

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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.