Home / 38,013.81-52,457.40-20,785.87

Finding the Fourth Proportional to 38,013.81, 52,457.40 and 20,785.87

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Solution

The fourth proportional to 38,013.81, 52,457.40 and 20,785.87 is: 28,683.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,013.81 : 52,457.40 = 20,785.87 : x
  2. Step 2: Convert to fraction form
    38,013.81/52,457.40 = 20,785.87/x
  3. Step 3: Cross multiply
    38,013.81x = 52,457.40 × 20,785.87
  4. Step 4: Simplify right side
    38,013.81x = 1,090,372,696.94
  5. Step 5: Solve for x
    x = 1,090,372,696.94/38,013.81
  6. Step 6: Final answer
    x = 28,683.59

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Double scale
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Similar ratio
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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.