Home / 15,787.95-21,795.26-9,821.57

Finding the Fourth Proportional to 15,787.95, 21,795.26 and 9,821.57

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Solution

The fourth proportional to 15,787.95, 21,795.26 and 9,821.57 is: 13,558.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.95 : 21,795.26 = 9,821.57 : x
  2. Step 2: Convert to fraction form
    15,787.95/21,795.26 = 9,821.57/x
  3. Step 3: Cross multiply
    15,787.95x = 21,795.26 × 9,821.57
  4. Step 4: Simplify right side
    15,787.95x = 214,063,513.67
  5. Step 5: Solve for x
    x = 214,063,513.67/15,787.95
  6. Step 6: Final answer
    x = 13,558.66

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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.