Home / 28,885.12-39,861.48-15,637.12

Finding the Fourth Proportional to 28,885.12, 39,861.48 and 15,637.12

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Solution

The fourth proportional to 28,885.12, 39,861.48 and 15,637.12 is: 21,579.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,885.12 : 39,861.48 = 15,637.12 : x
  2. Step 2: Convert to fraction form
    28,885.12/39,861.48 = 15,637.12/x
  3. Step 3: Cross multiply
    28,885.12x = 39,861.48 × 15,637.12
  4. Step 4: Simplify right side
    28,885.12x = 623,318,746.14
  5. Step 5: Solve for x
    x = 623,318,746.14/28,885.12
  6. Step 6: Final answer
    x = 21,579.23

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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.