Home / 28,631.49-39,511.88-21,448.68

Finding the Fourth Proportional to 28,631.49, 39,511.88 and 21,448.68

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Solution

The fourth proportional to 28,631.49, 39,511.88 and 21,448.68 is: 29,599.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.49 : 39,511.88 = 21,448.68 : x
  2. Step 2: Convert to fraction form
    28,631.49/39,511.88 = 21,448.68/x
  3. Step 3: Cross multiply
    28,631.49x = 39,511.88 × 21,448.68
  4. Step 4: Simplify right side
    28,631.49x = 847,477,563.08
  5. Step 5: Solve for x
    x = 847,477,563.08/28,631.49
  6. Step 6: Final answer
    x = 29,599.49

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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.