Home / 21,018.51-31,535.30-9,005.63

Finding the Fourth Proportional to 21,018.51, 31,535.30 and 9,005.63

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Solution

The fourth proportional to 21,018.51, 31,535.30 and 9,005.63 is: 13,511.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.51 : 31,535.30 = 9,005.63 : x
  2. Step 2: Convert to fraction form
    21,018.51/31,535.30 = 9,005.63/x
  3. Step 3: Cross multiply
    21,018.51x = 31,535.30 × 9,005.63
  4. Step 4: Simplify right side
    21,018.51x = 283,995,243.74
  5. Step 5: Solve for x
    x = 283,995,243.74/21,018.51
  6. Step 6: Final answer
    x = 13,511.67

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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.