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Finding the Fourth Proportional to 18,995.40, 28,494.72 and 4,957.29

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Solution

The fourth proportional to 18,995.40, 28,494.72 and 4,957.29 is: 7,436.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.40 : 28,494.72 = 4,957.29 : x
  2. Step 2: Convert to fraction form
    18,995.40/28,494.72 = 4,957.29/x
  3. Step 3: Cross multiply
    18,995.40x = 28,494.72 × 4,957.29
  4. Step 4: Simplify right side
    18,995.40x = 141,256,590.51
  5. Step 5: Solve for x
    x = 141,256,590.51/18,995.40
  6. Step 6: Final answer
    x = 7,436.36

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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.