Home / 39,830.16-59,745.24-12,128.40

Finding the Fourth Proportional to 39,830.16, 59,745.24 and 12,128.40

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Solution

The fourth proportional to 39,830.16, 59,745.24 and 12,128.40 is: 18,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,830.16 : 59,745.24 = 12,128.40 : x
  2. Step 2: Convert to fraction form
    39,830.16/59,745.24 = 12,128.40/x
  3. Step 3: Cross multiply
    39,830.16x = 59,745.24 × 12,128.40
  4. Step 4: Simplify right side
    39,830.16x = 724,614,168.82
  5. Step 5: Solve for x
    x = 724,614,168.82/39,830.16
  6. Step 6: Final answer
    x = 18,192.60

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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.