Home / 15,928.09-21,981.51-8,854.63

Finding the Fourth Proportional to 15,928.09, 21,981.51 and 8,854.63

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Solution

The fourth proportional to 15,928.09, 21,981.51 and 8,854.63 is: 12,219.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.09 : 21,981.51 = 8,854.63 : x
  2. Step 2: Convert to fraction form
    15,928.09/21,981.51 = 8,854.63/x
  3. Step 3: Cross multiply
    15,928.09x = 21,981.51 × 8,854.63
  4. Step 4: Simplify right side
    15,928.09x = 194,638,137.89
  5. Step 5: Solve for x
    x = 194,638,137.89/15,928.09
  6. Step 6: Final answer
    x = 12,219.80

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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.