Home / 28,529.78-39,381-19,606.82

Finding the Fourth Proportional to 28,529.78, 39,381 and 19,606.82

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Solution

The fourth proportional to 28,529.78, 39,381 and 19,606.82 is: 27,064.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529.78 : 39,381 = 19,606.82 : x
  2. Step 2: Convert to fraction form
    28,529.78/39,381 = 19,606.82/x
  3. Step 3: Cross multiply
    28,529.78x = 39,381 × 19,606.82
  4. Step 4: Simplify right side
    28,529.78x = 772,136,178.42
  5. Step 5: Solve for x
    x = 772,136,178.42/28,529.78
  6. Step 6: Final answer
    x = 27,064.22

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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.