Home / 15,931.08-21,983.60-8,857.35

Finding the Fourth Proportional to 15,931.08, 21,983.60 and 8,857.35

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Solution

The fourth proportional to 15,931.08, 21,983.60 and 8,857.35 is: 12,222.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.08 : 21,983.60 = 8,857.35 : x
  2. Step 2: Convert to fraction form
    15,931.08/21,983.60 = 8,857.35/x
  3. Step 3: Cross multiply
    15,931.08x = 21,983.60 × 8,857.35
  4. Step 4: Simplify right side
    15,931.08x = 194,716,461.60
  5. Step 5: Solve for x
    x = 194,716,461.60/15,931.08
  6. Step 6: Final answer
    x = 12,222.43

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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.