Home / 31,479.60-47,202.12-21,621.36

Finding the Fourth Proportional to 31,479.60, 47,202.12 and 21,621.36

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Solution

The fourth proportional to 31,479.60, 47,202.12 and 21,621.36 is: 32,420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,479.60 : 47,202.12 = 21,621.36 : x
  2. Step 2: Convert to fraction form
    31,479.60/47,202.12 = 21,621.36/x
  3. Step 3: Cross multiply
    31,479.60x = 47,202.12 × 21,621.36
  4. Step 4: Simplify right side
    31,479.60x = 1,020,574,029.28
  5. Step 5: Solve for x
    x = 1,020,574,029.28/31,479.60
  6. Step 6: Final answer
    x = 32,420.17

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1.5x scale

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.