Home / 20,656.13-31,123.06-18,683.98

Finding the Fourth Proportional to 20,656.13, 31,123.06 and 18,683.98

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Solution

The fourth proportional to 20,656.13, 31,123.06 and 18,683.98 is: 28,151.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.13 : 31,123.06 = 18,683.98 : x
  2. Step 2: Convert to fraction form
    20,656.13/31,123.06 = 18,683.98/x
  3. Step 3: Cross multiply
    20,656.13x = 31,123.06 × 18,683.98
  4. Step 4: Simplify right side
    20,656.13x = 581,502,506.06
  5. Step 5: Solve for x
    x = 581,502,506.06/20,656.13
  6. Step 6: Final answer
    x = 28,151.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.