Home / 20,276.72-27,942-15,502.06

Finding the Fourth Proportional to 20,276.72, 27,942 and 15,502.06

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Solution

The fourth proportional to 20,276.72, 27,942 and 15,502.06 is: 21,362.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.72 : 27,942 = 15,502.06 : x
  2. Step 2: Convert to fraction form
    20,276.72/27,942 = 15,502.06/x
  3. Step 3: Cross multiply
    20,276.72x = 27,942 × 15,502.06
  4. Step 4: Simplify right side
    20,276.72x = 433,158,420.81
  5. Step 5: Solve for x
    x = 433,158,420.81/20,276.72
  6. Step 6: Final answer
    x = 21,362.35

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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.