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Finding the Fourth Proportional to 19,510.40, 29,254.80 and 7,810.40

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Solution

The fourth proportional to 19,510.40, 29,254.80 and 7,810.40 is: 11,711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,510.40 : 29,254.80 = 7,810.40 : x
  2. Step 2: Convert to fraction form
    19,510.40/29,254.80 = 7,810.40/x
  3. Step 3: Cross multiply
    19,510.40x = 29,254.80 × 7,810.40
  4. Step 4: Simplify right side
    19,510.40x = 228,491,689.92
  5. Step 5: Solve for x
    x = 228,491,689.92/19,510.40
  6. Step 6: Final answer
    x = 11,711.28

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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.