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Finding the Fourth Proportional to 48,477.96, 72,708.84 and 13,421.16

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Solution

The fourth proportional to 48,477.96, 72,708.84 and 13,421.16 is: 20,129.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,477.96 : 72,708.84 = 13,421.16 : x
  2. Step 2: Convert to fraction form
    48,477.96/72,708.84 = 13,421.16/x
  3. Step 3: Cross multiply
    48,477.96x = 72,708.84 × 13,421.16
  4. Step 4: Simplify right side
    48,477.96x = 975,836,975.05
  5. Step 5: Solve for x
    x = 975,836,975.05/48,477.96
  6. Step 6: Final answer
    x = 20,129.50

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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.