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Finding the Fourth Proportional to 45,970.31, 68,957.78 and 12,689.63

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Solution

The fourth proportional to 45,970.31, 68,957.78 and 12,689.63 is: 19,035.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,970.31 : 68,957.78 = 12,689.63 : x
  2. Step 2: Convert to fraction form
    45,970.31/68,957.78 = 12,689.63/x
  3. Step 3: Cross multiply
    45,970.31x = 68,957.78 × 12,689.63
  4. Step 4: Simplify right side
    45,970.31x = 875,048,305.58
  5. Step 5: Solve for x
    x = 875,048,305.58/45,970.31
  6. Step 6: Final answer
    x = 19,035.08

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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.