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Finding the Fourth Proportional to 35,423.76, 53,138.90 and 9,128.60

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Solution

The fourth proportional to 35,423.76, 53,138.90 and 9,128.60 is: 13,693.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,423.76 : 53,138.90 = 9,128.60 : x
  2. Step 2: Convert to fraction form
    35,423.76/53,138.90 = 9,128.60/x
  3. Step 3: Cross multiply
    35,423.76x = 53,138.90 × 9,128.60
  4. Step 4: Simplify right side
    35,423.76x = 485,083,762.54
  5. Step 5: Solve for x
    x = 485,083,762.54/35,423.76
  6. Step 6: Final answer
    x = 13,693.74

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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.