Home / 21,045.37-31,559.82-7,890.57

Finding the Fourth Proportional to 21,045.37, 31,559.82 and 7,890.57

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Solution

The fourth proportional to 21,045.37, 31,559.82 and 7,890.57 is: 11,832.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.37 : 31,559.82 = 7,890.57 : x
  2. Step 2: Convert to fraction form
    21,045.37/31,559.82 = 7,890.57/x
  3. Step 3: Cross multiply
    21,045.37x = 31,559.82 × 7,890.57
  4. Step 4: Simplify right side
    21,045.37x = 249,024,968.90
  5. Step 5: Solve for x
    x = 249,024,968.90/21,045.37
  6. Step 6: Final answer
    x = 11,832.77

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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.