Home / 21,931.71-30,238.33-18,302.98

Finding the Fourth Proportional to 21,931.71, 30,238.33 and 18,302.98

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Solution

The fourth proportional to 21,931.71, 30,238.33 and 18,302.98 is: 25,235.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.71 : 30,238.33 = 18,302.98 : x
  2. Step 2: Convert to fraction form
    21,931.71/30,238.33 = 18,302.98/x
  3. Step 3: Cross multiply
    21,931.71x = 30,238.33 × 18,302.98
  4. Step 4: Simplify right side
    21,931.71x = 553,451,549.22
  5. Step 5: Solve for x
    x = 553,451,549.22/21,931.71
  6. Step 6: Final answer
    x = 25,235.22

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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.