Home / 21,365.43-29,477.75-12,411.21

Finding the Fourth Proportional to 21,365.43, 29,477.75 and 12,411.21

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Solution

The fourth proportional to 21,365.43, 29,477.75 and 12,411.21 is: 17,123.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.43 : 29,477.75 = 12,411.21 : x
  2. Step 2: Convert to fraction form
    21,365.43/29,477.75 = 12,411.21/x
  3. Step 3: Cross multiply
    21,365.43x = 29,477.75 × 12,411.21
  4. Step 4: Simplify right side
    21,365.43x = 365,854,545.58
  5. Step 5: Solve for x
    x = 365,854,545.58/21,365.43
  6. Step 6: Final answer
    x = 17,123.67

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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.