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Finding the Fourth Proportional to 18,426.48, 25,440.48 and 12,693.60

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Solution

The fourth proportional to 18,426.48, 25,440.48 and 12,693.60 is: 17,525.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,426.48 : 25,440.48 = 12,693.60 : x
  2. Step 2: Convert to fraction form
    18,426.48/25,440.48 = 12,693.60/x
  3. Step 3: Cross multiply
    18,426.48x = 25,440.48 × 12,693.60
  4. Step 4: Simplify right side
    18,426.48x = 322,931,276.93
  5. Step 5: Solve for x
    x = 322,931,276.93/18,426.48
  6. Step 6: Final answer
    x = 17,525.39

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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.