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Finding the Fourth Proportional to 18,807.40, 28,219.20 and 9,573.40

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Solution

The fourth proportional to 18,807.40, 28,219.20 and 9,573.40 is: 14,364.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.40 : 28,219.20 = 9,573.40 : x
  2. Step 2: Convert to fraction form
    18,807.40/28,219.20 = 9,573.40/x
  3. Step 3: Cross multiply
    18,807.40x = 28,219.20 × 9,573.40
  4. Step 4: Simplify right side
    18,807.40x = 270,153,689.28
  5. Step 5: Solve for x
    x = 270,153,689.28/18,807.40
  6. Step 6: Final answer
    x = 14,364.22

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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.