Home / 21,317.55-31,985.53-11,445.30

Finding the Fourth Proportional to 21,317.55, 31,985.53 and 11,445.30

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Solution

The fourth proportional to 21,317.55, 31,985.53 and 11,445.30 is: 17,172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.55 : 31,985.53 = 11,445.30 : x
  2. Step 2: Convert to fraction form
    21,317.55/31,985.53 = 11,445.30/x
  3. Step 3: Cross multiply
    21,317.55x = 31,985.53 × 11,445.30
  4. Step 4: Simplify right side
    21,317.55x = 366,083,986.51
  5. Step 5: Solve for x
    x = 366,083,986.51/21,317.55
  6. Step 6: Final answer
    x = 17,172.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.