Home / 15,501.67-21,392.30-8,428.07

Finding the Fourth Proportional to 15,501.67, 21,392.30 and 8,428.07

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Solution

The fourth proportional to 15,501.67, 21,392.30 and 8,428.07 is: 11,630.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.67 : 21,392.30 = 8,428.07 : x
  2. Step 2: Convert to fraction form
    15,501.67/21,392.30 = 8,428.07/x
  3. Step 3: Cross multiply
    15,501.67x = 21,392.30 × 8,428.07
  4. Step 4: Simplify right side
    15,501.67x = 180,295,801.86
  5. Step 5: Solve for x
    x = 180,295,801.86/15,501.67
  6. Step 6: Final answer
    x = 11,630.73

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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.