Home / 15,370.40-21,072.89-15,090.19

Finding the Fourth Proportional to 15,370.40, 21,072.89 and 15,090.19

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Solution

The fourth proportional to 15,370.40, 21,072.89 and 15,090.19 is: 20,688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,370.40 : 21,072.89 = 15,090.19 : x
  2. Step 2: Convert to fraction form
    15,370.40/21,072.89 = 15,090.19/x
  3. Step 3: Cross multiply
    15,370.40x = 21,072.89 × 15,090.19
  4. Step 4: Simplify right side
    15,370.40x = 317,993,808.58
  5. Step 5: Solve for x
    x = 317,993,808.58/15,370.40
  6. Step 6: Final answer
    x = 20,688.72

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.