Home / 15,787.89-21,795.17-9,821.50

Finding the Fourth Proportional to 15,787.89, 21,795.17 and 9,821.50

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Solution

The fourth proportional to 15,787.89, 21,795.17 and 9,821.50 is: 13,558.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.89 : 21,795.17 = 9,821.50 : x
  2. Step 2: Convert to fraction form
    15,787.89/21,795.17 = 9,821.50/x
  3. Step 3: Cross multiply
    15,787.89x = 21,795.17 × 9,821.50
  4. Step 4: Simplify right side
    15,787.89x = 214,061,153.18
  5. Step 5: Solve for x
    x = 214,061,153.18/15,787.89
  6. Step 6: Final answer
    x = 13,558.57

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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.