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Finding the Fourth Proportional to 19,730.76, 29,610.45 and 7,877.76

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Solution

The fourth proportional to 19,730.76, 29,610.45 and 7,877.76 is: 11,822.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,730.76 : 29,610.45 = 7,877.76 : x
  2. Step 2: Convert to fraction form
    19,730.76/29,610.45 = 7,877.76/x
  3. Step 3: Cross multiply
    19,730.76x = 29,610.45 × 7,877.76
  4. Step 4: Simplify right side
    19,730.76x = 233,264,018.59
  5. Step 5: Solve for x
    x = 233,264,018.59/19,730.76
  6. Step 6: Final answer
    x = 11,822.35

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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.