Home / 15,970.91-21,880.25-15,372.34

Finding the Fourth Proportional to 15,970.91, 21,880.25 and 15,372.34

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Solution

The fourth proportional to 15,970.91, 21,880.25 and 15,372.34 is: 21,060.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,970.91 : 21,880.25 = 15,372.34 : x
  2. Step 2: Convert to fraction form
    15,970.91/21,880.25 = 15,372.34/x
  3. Step 3: Cross multiply
    15,970.91x = 21,880.25 × 15,372.34
  4. Step 4: Simplify right side
    15,970.91x = 336,350,642.29
  5. Step 5: Solve for x
    x = 336,350,642.29/15,970.91
  6. Step 6: Final answer
    x = 21,060.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.