Home / 21,045.42-29,045.88-13,090.20

Finding the Fourth Proportional to 21,045.42, 29,045.88 and 13,090.20

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Solution

The fourth proportional to 21,045.42, 29,045.88 and 13,090.20 is: 18,066.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.42 : 29,045.88 = 13,090.20 : x
  2. Step 2: Convert to fraction form
    21,045.42/29,045.88 = 13,090.20/x
  3. Step 3: Cross multiply
    21,045.42x = 29,045.88 × 13,090.20
  4. Step 4: Simplify right side
    21,045.42x = 380,216,378.38
  5. Step 5: Solve for x
    x = 380,216,378.38/21,045.42
  6. Step 6: Final answer
    x = 18,066.47

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.