Home / 21,010.68-31,515.33-8,530.40

Finding the Fourth Proportional to 21,010.68, 31,515.33 and 8,530.40

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Solution

The fourth proportional to 21,010.68, 31,515.33 and 8,530.40 is: 12,795.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.68 : 31,515.33 = 8,530.40 : x
  2. Step 2: Convert to fraction form
    21,010.68/31,515.33 = 8,530.40/x
  3. Step 3: Cross multiply
    21,010.68x = 31,515.33 × 8,530.40
  4. Step 4: Simplify right side
    21,010.68x = 268,838,213.46
  5. Step 5: Solve for x
    x = 268,838,213.46/21,010.68
  6. Step 6: Final answer
    x = 12,795.31

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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.