Home / 21,172.13-29,231.32-14,455.31

Finding the Fourth Proportional to 21,172.13, 29,231.32 and 14,455.31

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Solution

The fourth proportional to 21,172.13, 29,231.32 and 14,455.31 is: 19,957.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.13 : 29,231.32 = 14,455.31 : x
  2. Step 2: Convert to fraction form
    21,172.13/29,231.32 = 14,455.31/x
  3. Step 3: Cross multiply
    21,172.13x = 29,231.32 × 14,455.31
  4. Step 4: Simplify right side
    21,172.13x = 422,547,792.31
  5. Step 5: Solve for x
    x = 422,547,792.31/21,172.13
  6. Step 6: Final answer
    x = 19,957.74

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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.