Home / 21,009.17-31,513.08-8,528.90

Finding the Fourth Proportional to 21,009.17, 31,513.08 and 8,528.90

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Solution

The fourth proportional to 21,009.17, 31,513.08 and 8,528.90 is: 12,793.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.17 : 31,513.08 = 8,528.90 : x
  2. Step 2: Convert to fraction form
    21,009.17/31,513.08 = 8,528.90/x
  3. Step 3: Cross multiply
    21,009.17x = 31,513.08 × 8,528.90
  4. Step 4: Simplify right side
    21,009.17x = 268,771,782.43
  5. Step 5: Solve for x
    x = 268,771,782.43/21,009.17
  6. Step 6: Final answer
    x = 12,793.07

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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.