Home / 28,239.40-38,970.66-15,492.60

Finding the Fourth Proportional to 28,239.40, 38,970.66 and 15,492.60

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Solution

The fourth proportional to 28,239.40, 38,970.66 and 15,492.60 is: 21,379.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.40 : 38,970.66 = 15,492.60 : x
  2. Step 2: Convert to fraction form
    28,239.40/38,970.66 = 15,492.60/x
  3. Step 3: Cross multiply
    28,239.40x = 38,970.66 × 15,492.60
  4. Step 4: Simplify right side
    28,239.40x = 603,756,905.21
  5. Step 5: Solve for x
    x = 603,756,905.21/28,239.40
  6. Step 6: Final answer
    x = 21,379.95

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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.