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Finding the Fourth Proportional to 13,412.38, 18,509.08 and 7,445

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Solution

The fourth proportional to 13,412.38, 18,509.08 and 7,445 is: 10,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.38 : 18,509.08 = 7,445 : x
  2. Step 2: Convert to fraction form
    13,412.38/18,509.08 = 7,445/x
  3. Step 3: Cross multiply
    13,412.38x = 18,509.08 × 7,445
  4. Step 4: Simplify right side
    13,412.38x = 137,800,100.60
  5. Step 5: Solve for x
    x = 137,800,100.60/13,412.38
  6. Step 6: Final answer
    x = 10,274.10

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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.