Home / 21,161.04-29,159.64-15,817.20

Finding the Fourth Proportional to 21,161.04, 29,159.64 and 15,817.20

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Solution

The fourth proportional to 21,161.04, 29,159.64 and 15,817.20 is: 21,795.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.04 : 29,159.64 = 15,817.20 : x
  2. Step 2: Convert to fraction form
    21,161.04/29,159.64 = 15,817.20/x
  3. Step 3: Cross multiply
    21,161.04x = 29,159.64 × 15,817.20
  4. Step 4: Simplify right side
    21,161.04x = 461,223,857.81
  5. Step 5: Solve for x
    x = 461,223,857.81/21,161.04
  6. Step 6: Final answer
    x = 21,795.90

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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.