Home / 21,264.51-31,864.43-10,155.90

Finding the Fourth Proportional to 21,264.51, 31,864.43 and 10,155.90

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Solution

The fourth proportional to 21,264.51, 31,864.43 and 10,155.90 is: 15,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,264.51 : 31,864.43 = 10,155.90 : x
  2. Step 2: Convert to fraction form
    21,264.51/31,864.43 = 10,155.90/x
  3. Step 3: Cross multiply
    21,264.51x = 31,864.43 × 10,155.90
  4. Step 4: Simplify right side
    21,264.51x = 323,611,913.86
  5. Step 5: Solve for x
    x = 323,611,913.86/21,264.51
  6. Step 6: Final answer
    x = 15,218.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.