Home / 21,038.08-31,578.51-10,515.65

Finding the Fourth Proportional to 21,038.08, 31,578.51 and 10,515.65

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Solution

The fourth proportional to 21,038.08, 31,578.51 and 10,515.65 is: 15,784.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.08 : 31,578.51 = 10,515.65 : x
  2. Step 2: Convert to fraction form
    21,038.08/31,578.51 = 10,515.65/x
  3. Step 3: Cross multiply
    21,038.08x = 31,578.51 × 10,515.65
  4. Step 4: Simplify right side
    21,038.08x = 332,068,558.68
  5. Step 5: Solve for x
    x = 332,068,558.68/21,038.08
  6. Step 6: Final answer
    x = 15,784.17

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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.