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Finding the Fourth Proportional to 19,800.48, 29,700.72 and 7,959.64

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Solution

The fourth proportional to 19,800.48, 29,700.72 and 7,959.64 is: 11,939.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,800.48 : 29,700.72 = 7,959.64 : x
  2. Step 2: Convert to fraction form
    19,800.48/29,700.72 = 7,959.64/x
  3. Step 3: Cross multiply
    19,800.48x = 29,700.72 × 7,959.64
  4. Step 4: Simplify right side
    19,800.48x = 236,407,038.94
  5. Step 5: Solve for x
    x = 236,407,038.94/19,800.48
  6. Step 6: Final answer
    x = 11,939.46

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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.