Home / 38,916.32-53,700.64-21,920.09

Finding the Fourth Proportional to 38,916.32, 53,700.64 and 21,920.09

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Solution

The fourth proportional to 38,916.32, 53,700.64 and 21,920.09 is: 30,247.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,916.32 : 53,700.64 = 21,920.09 : x
  2. Step 2: Convert to fraction form
    38,916.32/53,700.64 = 21,920.09/x
  3. Step 3: Cross multiply
    38,916.32x = 53,700.64 × 21,920.09
  4. Step 4: Simplify right side
    38,916.32x = 1,177,122,538.55
  5. Step 5: Solve for x
    x = 1,177,122,538.55/38,916.32
  6. Step 6: Final answer
    x = 30,247.53

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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.