Home / 15,455.17-21,324.54-10,428.72

Finding the Fourth Proportional to 15,455.17, 21,324.54 and 10,428.72

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Solution

The fourth proportional to 15,455.17, 21,324.54 and 10,428.72 is: 14,389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.17 : 21,324.54 = 10,428.72 : x
  2. Step 2: Convert to fraction form
    15,455.17/21,324.54 = 10,428.72/x
  3. Step 3: Cross multiply
    15,455.17x = 21,324.54 × 10,428.72
  4. Step 4: Simplify right side
    15,455.17x = 222,387,656.79
  5. Step 5: Solve for x
    x = 222,387,656.79/15,455.17
  6. Step 6: Final answer
    x = 14,389.21

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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.