Home / 21,030.30-31,545.45-7,881.98

Finding the Fourth Proportional to 21,030.30, 31,545.45 and 7,881.98

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Solution

The fourth proportional to 21,030.30, 31,545.45 and 7,881.98 is: 11,822.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.30 : 31,545.45 = 7,881.98 : x
  2. Step 2: Convert to fraction form
    21,030.30/31,545.45 = 7,881.98/x
  3. Step 3: Cross multiply
    21,030.30x = 31,545.45 × 7,881.98
  4. Step 4: Simplify right side
    21,030.30x = 248,640,448.26
  5. Step 5: Solve for x
    x = 248,640,448.26/21,030.30
  6. Step 6: Final answer
    x = 11,822.96

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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.