Home / 21,237.42-31,670.70-18,617.07

Finding the Fourth Proportional to 21,237.42, 31,670.70 and 18,617.07

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Solution

The fourth proportional to 21,237.42, 31,670.70 and 18,617.07 is: 27,763.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.42 : 31,670.70 = 18,617.07 : x
  2. Step 2: Convert to fraction form
    21,237.42/31,670.70 = 18,617.07/x
  3. Step 3: Cross multiply
    21,237.42x = 31,670.70 × 18,617.07
  4. Step 4: Simplify right side
    21,237.42x = 589,615,638.85
  5. Step 5: Solve for x
    x = 589,615,638.85/21,237.42
  6. Step 6: Final answer
    x = 27,763.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.