Home / 21,845.51-32,715.19-12,457.20

Finding the Fourth Proportional to 21,845.51, 32,715.19 and 12,457.20

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Solution

The fourth proportional to 21,845.51, 32,715.19 and 12,457.20 is: 18,655.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.51 : 32,715.19 = 12,457.20 : x
  2. Step 2: Convert to fraction form
    21,845.51/32,715.19 = 12,457.20/x
  3. Step 3: Cross multiply
    21,845.51x = 32,715.19 × 12,457.20
  4. Step 4: Simplify right side
    21,845.51x = 407,539,664.87
  5. Step 5: Solve for x
    x = 407,539,664.87/21,845.51
  6. Step 6: Final answer
    x = 18,655.53

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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.