Home / 15,688.84-21,650.09-11,220.07

Finding the Fourth Proportional to 15,688.84, 21,650.09 and 11,220.07

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Solution

The fourth proportional to 15,688.84, 21,650.09 and 11,220.07 is: 15,483.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.84 : 21,650.09 = 11,220.07 : x
  2. Step 2: Convert to fraction form
    15,688.84/21,650.09 = 11,220.07/x
  3. Step 3: Cross multiply
    15,688.84x = 21,650.09 × 11,220.07
  4. Step 4: Simplify right side
    15,688.84x = 242,915,455.67
  5. Step 5: Solve for x
    x = 242,915,455.67/15,688.84
  6. Step 6: Final answer
    x = 15,483.33

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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.