Home / 31,130.40-46,622.70-19,320.60

Finding the Fourth Proportional to 31,130.40, 46,622.70 and 19,320.60

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Solution

The fourth proportional to 31,130.40, 46,622.70 and 19,320.60 is: 28,935.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,130.40 : 46,622.70 = 19,320.60 : x
  2. Step 2: Convert to fraction form
    31,130.40/46,622.70 = 19,320.60/x
  3. Step 3: Cross multiply
    31,130.40x = 46,622.70 × 19,320.60
  4. Step 4: Simplify right side
    31,130.40x = 900,778,537.62
  5. Step 5: Solve for x
    x = 900,778,537.62/31,130.40
  6. Step 6: Final answer
    x = 28,935.66

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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.