Home / 21,172.34-29,219.56-11,740.70

Finding the Fourth Proportional to 21,172.34, 29,219.56 and 11,740.70

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Solution

The fourth proportional to 21,172.34, 29,219.56 and 11,740.70 is: 16,203.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.34 : 29,219.56 = 11,740.70 : x
  2. Step 2: Convert to fraction form
    21,172.34/29,219.56 = 11,740.70/x
  3. Step 3: Cross multiply
    21,172.34x = 29,219.56 × 11,740.70
  4. Step 4: Simplify right side
    21,172.34x = 343,058,088.09
  5. Step 5: Solve for x
    x = 343,058,088.09/21,172.34
  6. Step 6: Final answer
    x = 16,203.13

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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.