Home / 28,461-39,276.18-15,885.75

Finding the Fourth Proportional to 28,461, 39,276.18 and 15,885.75

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Solution

The fourth proportional to 28,461, 39,276.18 and 15,885.75 is: 21,922.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461 : 39,276.18 = 15,885.75 : x
  2. Step 2: Convert to fraction form
    28,461/39,276.18 = 15,885.75/x
  3. Step 3: Cross multiply
    28,461x = 39,276.18 × 15,885.75
  4. Step 4: Simplify right side
    28,461x = 623,931,576.44
  5. Step 5: Solve for x
    x = 623,931,576.44/28,461
  6. Step 6: Final answer
    x = 21,922.34

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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.