Home / 21,681.32-29,918.58-12,250.76

Finding the Fourth Proportional to 21,681.32, 29,918.58 and 12,250.76

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Solution

The fourth proportional to 21,681.32, 29,918.58 and 12,250.76 is: 16,905.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.32 : 29,918.58 = 12,250.76 : x
  2. Step 2: Convert to fraction form
    21,681.32/29,918.58 = 12,250.76/x
  3. Step 3: Cross multiply
    21,681.32x = 29,918.58 × 12,250.76
  4. Step 4: Simplify right side
    21,681.32x = 366,525,343.12
  5. Step 5: Solve for x
    x = 366,525,343.12/21,681.32
  6. Step 6: Final answer
    x = 16,905.12

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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.