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Finding the Fourth Proportional to 28,890.40, 43,341.90 and 16,416.40

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Solution

The fourth proportional to 28,890.40, 43,341.90 and 16,416.40 is: 24,628.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.40 : 43,341.90 = 16,416.40 : x
  2. Step 2: Convert to fraction form
    28,890.40/43,341.90 = 16,416.40/x
  3. Step 3: Cross multiply
    28,890.40x = 43,341.90 × 16,416.40
  4. Step 4: Simplify right side
    28,890.40x = 711,517,967.16
  5. Step 5: Solve for x
    x = 711,517,967.16/28,890.40
  6. Step 6: Final answer
    x = 24,628.18

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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.