Home / 21,167.10-31,750.65-19,854.90

Finding the Fourth Proportional to 21,167.10, 31,750.65 and 19,854.90

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Solution

The fourth proportional to 21,167.10, 31,750.65 and 19,854.90 is: 29,782.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.10 : 31,750.65 = 19,854.90 : x
  2. Step 2: Convert to fraction form
    21,167.10/31,750.65 = 19,854.90/x
  3. Step 3: Cross multiply
    21,167.10x = 31,750.65 × 19,854.90
  4. Step 4: Simplify right side
    21,167.10x = 630,405,980.69
  5. Step 5: Solve for x
    x = 630,405,980.69/21,167.10
  6. Step 6: Final answer
    x = 29,782.35

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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.