Home / 15,781.04-21,771.24-10,478.72

Finding the Fourth Proportional to 15,781.04, 21,771.24 and 10,478.72

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Solution

The fourth proportional to 15,781.04, 21,771.24 and 10,478.72 is: 14,456.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.04 : 21,771.24 = 10,478.72 : x
  2. Step 2: Convert to fraction form
    15,781.04/21,771.24 = 10,478.72/x
  3. Step 3: Cross multiply
    15,781.04x = 21,771.24 × 10,478.72
  4. Step 4: Simplify right side
    15,781.04x = 228,134,728.01
  5. Step 5: Solve for x
    x = 228,134,728.01/15,781.04
  6. Step 6: Final answer
    x = 14,456.25

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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.