Home / 13,130.96-19,680.02-8,438.47

Finding the Fourth Proportional to 13,130.96, 19,680.02 and 8,438.47

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Solution

The fourth proportional to 13,130.96, 19,680.02 and 8,438.47 is: 12,647.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.96 : 19,680.02 = 8,438.47 : x
  2. Step 2: Convert to fraction form
    13,130.96/19,680.02 = 8,438.47/x
  3. Step 3: Cross multiply
    13,130.96x = 19,680.02 × 8,438.47
  4. Step 4: Simplify right side
    13,130.96x = 166,069,230.27
  5. Step 5: Solve for x
    x = 166,069,230.27/13,130.96
  6. Step 6: Final answer
    x = 12,647.16

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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.