Home / 13,545.77-20,420.18-12,642.62

Finding the Fourth Proportional to 13,545.77, 20,420.18 and 12,642.62

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Solution

The fourth proportional to 13,545.77, 20,420.18 and 12,642.62 is: 19,058.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.77 : 20,420.18 = 12,642.62 : x
  2. Step 2: Convert to fraction form
    13,545.77/20,420.18 = 12,642.62/x
  3. Step 3: Cross multiply
    13,545.77x = 20,420.18 × 12,642.62
  4. Step 4: Simplify right side
    13,545.77x = 258,164,410.76
  5. Step 5: Solve for x
    x = 258,164,410.76/13,545.77
  6. Step 6: Final answer
    x = 19,058.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.