Home / 28,459.46-39,276.21-15,715.07

Finding the Fourth Proportional to 28,459.46, 39,276.21 and 15,715.07

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Solution

The fourth proportional to 28,459.46, 39,276.21 and 15,715.07 is: 21,687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,459.46 : 39,276.21 = 15,715.07 : x
  2. Step 2: Convert to fraction form
    28,459.46/39,276.21 = 15,715.07/x
  3. Step 3: Cross multiply
    28,459.46x = 39,276.21 × 15,715.07
  4. Step 4: Simplify right side
    28,459.46x = 617,228,389.48
  5. Step 5: Solve for x
    x = 617,228,389.48/28,459.46
  6. Step 6: Final answer
    x = 21,687.99

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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.