Home / 15,331.21-21,159.02-9,361.62

Finding the Fourth Proportional to 15,331.21, 21,159.02 and 9,361.62

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Solution

The fourth proportional to 15,331.21, 21,159.02 and 9,361.62 is: 12,920.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.21 : 21,159.02 = 9,361.62 : x
  2. Step 2: Convert to fraction form
    15,331.21/21,159.02 = 9,361.62/x
  3. Step 3: Cross multiply
    15,331.21x = 21,159.02 × 9,361.62
  4. Step 4: Simplify right side
    15,331.21x = 198,082,728.22
  5. Step 5: Solve for x
    x = 198,082,728.22/15,331.21
  6. Step 6: Final answer
    x = 12,920.23

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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.