Home / 21,011.60-31,530.54-8,531.68

Finding the Fourth Proportional to 21,011.60, 31,530.54 and 8,531.68

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Solution

The fourth proportional to 21,011.60, 31,530.54 and 8,531.68 is: 12,802.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.60 : 31,530.54 = 8,531.68 : x
  2. Step 2: Convert to fraction form
    21,011.60/31,530.54 = 8,531.68/x
  3. Step 3: Cross multiply
    21,011.60x = 31,530.54 × 8,531.68
  4. Step 4: Simplify right side
    21,011.60x = 269,008,477.51
  5. Step 5: Solve for x
    x = 269,008,477.51/21,011.60
  6. Step 6: Final answer
    x = 12,802.86

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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.