Home / 15,428.83-21,291.76-8,355.23

Finding the Fourth Proportional to 15,428.83, 21,291.76 and 8,355.23

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Solution

The fourth proportional to 15,428.83, 21,291.76 and 8,355.23 is: 11,530.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.83 : 21,291.76 = 8,355.23 : x
  2. Step 2: Convert to fraction form
    15,428.83/21,291.76 = 8,355.23/x
  3. Step 3: Cross multiply
    15,428.83x = 21,291.76 × 8,355.23
  4. Step 4: Simplify right side
    15,428.83x = 177,897,510.13
  5. Step 5: Solve for x
    x = 177,897,510.13/15,428.83
  6. Step 6: Final answer
    x = 11,530.20

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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.