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Finding the Fourth Proportional to 21,970.48, 30,319.68 and 12,034.48

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Solution

The fourth proportional to 21,970.48, 30,319.68 and 12,034.48 is: 16,607.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.48 : 30,319.68 = 12,034.48 : x
  2. Step 2: Convert to fraction form
    21,970.48/30,319.68 = 12,034.48/x
  3. Step 3: Cross multiply
    21,970.48x = 30,319.68 × 12,034.48
  4. Step 4: Simplify right side
    21,970.48x = 364,881,582.57
  5. Step 5: Solve for x
    x = 364,881,582.57/21,970.48
  6. Step 6: Final answer
    x = 16,607.81

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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.