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Finding the Fourth Proportional to 18,572.79, 25,616.15 and 12,907.47

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Solution

The fourth proportional to 18,572.79, 25,616.15 and 12,907.47 is: 17,802.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.79 : 25,616.15 = 12,907.47 : x
  2. Step 2: Convert to fraction form
    18,572.79/25,616.15 = 12,907.47/x
  3. Step 3: Cross multiply
    18,572.79x = 25,616.15 × 12,907.47
  4. Step 4: Simplify right side
    18,572.79x = 330,639,623.10
  5. Step 5: Solve for x
    x = 330,639,623.10/18,572.79
  6. Step 6: Final answer
    x = 17,802.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.