Home / 13,420.08-18,528.48-8,717.76

Finding the Fourth Proportional to 13,420.08, 18,528.48 and 8,717.76

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Solution

The fourth proportional to 13,420.08, 18,528.48 and 8,717.76 is: 12,036.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.08 : 18,528.48 = 8,717.76 : x
  2. Step 2: Convert to fraction form
    13,420.08/18,528.48 = 8,717.76/x
  3. Step 3: Cross multiply
    13,420.08x = 18,528.48 × 8,717.76
  4. Step 4: Simplify right side
    13,420.08x = 161,526,841.80
  5. Step 5: Solve for x
    x = 161,526,841.80/13,420.08
  6. Step 6: Final answer
    x = 12,036.21

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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.