Home / 15,631.70-21,573.47-8,918.98

Finding the Fourth Proportional to 15,631.70, 21,573.47 and 8,918.98

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Solution

The fourth proportional to 15,631.70, 21,573.47 and 8,918.98 is: 12,309.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.70 : 21,573.47 = 8,918.98 : x
  2. Step 2: Convert to fraction form
    15,631.70/21,573.47 = 8,918.98/x
  3. Step 3: Cross multiply
    15,631.70x = 21,573.47 × 8,918.98
  4. Step 4: Simplify right side
    15,631.70x = 192,413,315.82
  5. Step 5: Solve for x
    x = 192,413,315.82/15,631.70
  6. Step 6: Final answer
    x = 12,309.18

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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.