Home / 21,864.10-32,812.08-8,720.23

Finding the Fourth Proportional to 21,864.10, 32,812.08 and 8,720.23

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Solution

The fourth proportional to 21,864.10, 32,812.08 and 8,720.23 is: 13,086.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.10 : 32,812.08 = 8,720.23 : x
  2. Step 2: Convert to fraction form
    21,864.10/32,812.08 = 8,720.23/x
  3. Step 3: Cross multiply
    21,864.10x = 32,812.08 × 8,720.23
  4. Step 4: Simplify right side
    21,864.10x = 286,128,676.72
  5. Step 5: Solve for x
    x = 286,128,676.72/21,864.10
  6. Step 6: Final answer
    x = 13,086.69

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1.5x scale

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.