Home / 21,816.61-30,107.67-12,258.19

Finding the Fourth Proportional to 21,816.61, 30,107.67 and 12,258.19

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Solution

The fourth proportional to 21,816.61, 30,107.67 and 12,258.19 is: 16,916.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.61 : 30,107.67 = 12,258.19 : x
  2. Step 2: Convert to fraction form
    21,816.61/30,107.67 = 12,258.19/x
  3. Step 3: Cross multiply
    21,816.61x = 30,107.67 × 12,258.19
  4. Step 4: Simplify right side
    21,816.61x = 369,065,539.32
  5. Step 5: Solve for x
    x = 369,065,539.32/21,816.61
  6. Step 6: Final answer
    x = 16,916.72

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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.