Home / 28,423-39,225.30-15,847.72

Finding the Fourth Proportional to 28,423, 39,225.30 and 15,847.72

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Solution

The fourth proportional to 28,423, 39,225.30 and 15,847.72 is: 21,870.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423 : 39,225.30 = 15,847.72 : x
  2. Step 2: Convert to fraction form
    28,423/39,225.30 = 15,847.72/x
  3. Step 3: Cross multiply
    28,423x = 39,225.30 × 15,847.72
  4. Step 4: Simplify right side
    28,423x = 621,631,571.32
  5. Step 5: Solve for x
    x = 621,631,571.32/28,423
  6. Step 6: Final answer
    x = 21,870.72

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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.