Home / 21,068.10-31,606.86-7,920.58

Finding the Fourth Proportional to 21,068.10, 31,606.86 and 7,920.58

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Solution

The fourth proportional to 21,068.10, 31,606.86 and 7,920.58 is: 11,882.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,068.10 : 31,606.86 = 7,920.58 : x
  2. Step 2: Convert to fraction form
    21,068.10/31,606.86 = 7,920.58/x
  3. Step 3: Cross multiply
    21,068.10x = 31,606.86 × 7,920.58
  4. Step 4: Simplify right side
    21,068.10x = 250,344,663.18
  5. Step 5: Solve for x
    x = 250,344,663.18/21,068.10
  6. Step 6: Final answer
    x = 11,882.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.