Home / 13,451.05-18,564.15-7,485.40

Finding the Fourth Proportional to 13,451.05, 18,564.15 and 7,485.40

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Solution

The fourth proportional to 13,451.05, 18,564.15 and 7,485.40 is: 10,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,451.05 : 18,564.15 = 7,485.40 : x
  2. Step 2: Convert to fraction form
    13,451.05/18,564.15 = 7,485.40/x
  3. Step 3: Cross multiply
    13,451.05x = 18,564.15 × 7,485.40
  4. Step 4: Simplify right side
    13,451.05x = 138,960,088.41
  5. Step 5: Solve for x
    x = 138,960,088.41/13,451.05
  6. Step 6: Final answer
    x = 10,330.80

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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.