Home / 31,005.18-42,787.44-18,427.50

Finding the Fourth Proportional to 31,005.18, 42,787.44 and 18,427.50

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Solution

The fourth proportional to 31,005.18, 42,787.44 and 18,427.50 is: 25,430.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,005.18 : 42,787.44 = 18,427.50 : x
  2. Step 2: Convert to fraction form
    31,005.18/42,787.44 = 18,427.50/x
  3. Step 3: Cross multiply
    31,005.18x = 42,787.44 × 18,427.50
  4. Step 4: Simplify right side
    31,005.18x = 788,465,550.60
  5. Step 5: Solve for x
    x = 788,465,550.60/31,005.18
  6. Step 6: Final answer
    x = 25,430.12

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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.