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Finding the Fourth Proportional to 18,999.70, 28,528.35 and 14,622.10

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Solution

The fourth proportional to 18,999.70, 28,528.35 and 14,622.10 is: 21,955.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.70 : 28,528.35 = 14,622.10 : x
  2. Step 2: Convert to fraction form
    18,999.70/28,528.35 = 14,622.10/x
  3. Step 3: Cross multiply
    18,999.70x = 28,528.35 × 14,622.10
  4. Step 4: Simplify right side
    18,999.70x = 417,144,386.54
  5. Step 5: Solve for x
    x = 417,144,386.54/18,999.70
  6. Step 6: Final answer
    x = 21,955.31

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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.