Home / 13,520.30-18,657.08-7,470.28

Finding the Fourth Proportional to 13,520.30, 18,657.08 and 7,470.28

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Solution

The fourth proportional to 13,520.30, 18,657.08 and 7,470.28 is: 10,308.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.30 : 18,657.08 = 7,470.28 : x
  2. Step 2: Convert to fraction form
    13,520.30/18,657.08 = 7,470.28/x
  3. Step 3: Cross multiply
    13,520.30x = 18,657.08 × 7,470.28
  4. Step 4: Simplify right side
    13,520.30x = 139,373,611.58
  5. Step 5: Solve for x
    x = 139,373,611.58/13,520.30
  6. Step 6: Final answer
    x = 10,308.47

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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.