Home / 13,386.53-20,068.47-8,445.30

Finding the Fourth Proportional to 13,386.53, 20,068.47 and 8,445.30

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Solution

The fourth proportional to 13,386.53, 20,068.47 and 8,445.30 is: 12,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.53 : 20,068.47 = 8,445.30 : x
  2. Step 2: Convert to fraction form
    13,386.53/20,068.47 = 8,445.30/x
  3. Step 3: Cross multiply
    13,386.53x = 20,068.47 × 8,445.30
  4. Step 4: Simplify right side
    13,386.53x = 169,484,249.69
  5. Step 5: Solve for x
    x = 169,484,249.69/13,386.53
  6. Step 6: Final answer
    x = 12,660.81

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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.