Home / 28,457.30-39,306.03-21,319.16

Finding the Fourth Proportional to 28,457.30, 39,306.03 and 21,319.16

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Solution

The fourth proportional to 28,457.30, 39,306.03 and 21,319.16 is: 29,446.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,457.30 : 39,306.03 = 21,319.16 : x
  2. Step 2: Convert to fraction form
    28,457.30/39,306.03 = 21,319.16/x
  3. Step 3: Cross multiply
    28,457.30x = 39,306.03 × 21,319.16
  4. Step 4: Simplify right side
    28,457.30x = 837,971,346.00
  5. Step 5: Solve for x
    x = 837,971,346.00/28,457.30
  6. Step 6: Final answer
    x = 29,446.62

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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.