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Finding the Fourth Proportional to 19,312.71, 28,985.46 and 7,634.13

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Solution

The fourth proportional to 19,312.71, 28,985.46 and 7,634.13 is: 11,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,312.71 : 28,985.46 = 7,634.13 : x
  2. Step 2: Convert to fraction form
    19,312.71/28,985.46 = 7,634.13/x
  3. Step 3: Cross multiply
    19,312.71x = 28,985.46 × 7,634.13
  4. Step 4: Simplify right side
    19,312.71x = 221,278,769.75
  5. Step 5: Solve for x
    x = 221,278,769.75/19,312.71
  6. Step 6: Final answer
    x = 11,457.68

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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.