Home / 28,368.45-42,468.44-21,005.55

Finding the Fourth Proportional to 28,368.45, 42,468.44 and 21,005.55

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Solution

The fourth proportional to 28,368.45, 42,468.44 and 21,005.55 is: 31,445.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368.45 : 42,468.44 = 21,005.55 : x
  2. Step 2: Convert to fraction form
    28,368.45/42,468.44 = 21,005.55/x
  3. Step 3: Cross multiply
    28,368.45x = 42,468.44 × 21,005.55
  4. Step 4: Simplify right side
    28,368.45x = 892,072,834.81
  5. Step 5: Solve for x
    x = 892,072,834.81/28,368.45
  6. Step 6: Final answer
    x = 31,445.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.