Home / 31,045.32-42,792.60-20,970.60

Finding the Fourth Proportional to 31,045.32, 42,792.60 and 20,970.60

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Solution

The fourth proportional to 31,045.32, 42,792.60 and 20,970.60 is: 28,905.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,045.32 : 42,792.60 = 20,970.60 : x
  2. Step 2: Convert to fraction form
    31,045.32/42,792.60 = 20,970.60/x
  3. Step 3: Cross multiply
    31,045.32x = 42,792.60 × 20,970.60
  4. Step 4: Simplify right side
    31,045.32x = 897,386,497.56
  5. Step 5: Solve for x
    x = 897,386,497.56/31,045.32
  6. Step 6: Final answer
    x = 28,905.69

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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.