Home / 15,931.64-21,985.68-8,859.44

Finding the Fourth Proportional to 15,931.64, 21,985.68 and 8,859.44

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Solution

The fourth proportional to 15,931.64, 21,985.68 and 8,859.44 is: 12,226.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.64 : 21,985.68 = 8,859.44 : x
  2. Step 2: Convert to fraction form
    15,931.64/21,985.68 = 8,859.44/x
  3. Step 3: Cross multiply
    15,931.64x = 21,985.68 × 8,859.44
  4. Step 4: Simplify right side
    15,931.64x = 194,780,702.89
  5. Step 5: Solve for x
    x = 194,780,702.89/15,931.64
  6. Step 6: Final answer
    x = 12,226.03

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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.