Home / 38,639.72-53,322.09-21,643.76

Finding the Fourth Proportional to 38,639.72, 53,322.09 and 21,643.76

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Solution

The fourth proportional to 38,639.72, 53,322.09 and 21,643.76 is: 29,867.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.72 : 53,322.09 = 21,643.76 : x
  2. Step 2: Convert to fraction form
    38,639.72/53,322.09 = 21,643.76/x
  3. Step 3: Cross multiply
    38,639.72x = 53,322.09 × 21,643.76
  4. Step 4: Simplify right side
    38,639.72x = 1,154,090,518.66
  5. Step 5: Solve for x
    x = 1,154,090,518.66/38,639.72
  6. Step 6: Final answer
    x = 29,867.98

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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.