Home / 21,289.12-31,948.08-7,438.24

Finding the Fourth Proportional to 21,289.12, 31,948.08 and 7,438.24

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Solution

The fourth proportional to 21,289.12, 31,948.08 and 7,438.24 is: 11,162.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.12 : 31,948.08 = 7,438.24 : x
  2. Step 2: Convert to fraction form
    21,289.12/31,948.08 = 7,438.24/x
  3. Step 3: Cross multiply
    21,289.12x = 31,948.08 × 7,438.24
  4. Step 4: Simplify right side
    21,289.12x = 237,637,486.58
  5. Step 5: Solve for x
    x = 237,637,486.58/21,289.12
  6. Step 6: Final answer
    x = 11,162.39

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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.