Home / 21,045-31,559.26-7,890.19

Finding the Fourth Proportional to 21,045, 31,559.26 and 7,890.19

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Solution

The fourth proportional to 21,045, 31,559.26 and 7,890.19 is: 11,832.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045 : 31,559.26 = 7,890.19 : x
  2. Step 2: Convert to fraction form
    21,045/31,559.26 = 7,890.19/x
  3. Step 3: Cross multiply
    21,045x = 31,559.26 × 7,890.19
  4. Step 4: Simplify right side
    21,045x = 249,008,557.66
  5. Step 5: Solve for x
    x = 249,008,557.66/21,045
  6. Step 6: Final answer
    x = 11,832.20

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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.