Home / 13,315.07-19,938.45-12,920.90

Finding the Fourth Proportional to 13,315.07, 19,938.45 and 12,920.90

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Solution

The fourth proportional to 13,315.07, 19,938.45 and 12,920.90 is: 19,348.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.07 : 19,938.45 = 12,920.90 : x
  2. Step 2: Convert to fraction form
    13,315.07/19,938.45 = 12,920.90/x
  3. Step 3: Cross multiply
    13,315.07x = 19,938.45 × 12,920.90
  4. Step 4: Simplify right side
    13,315.07x = 257,622,718.61
  5. Step 5: Solve for x
    x = 257,622,718.61/13,315.07
  6. Step 6: Final answer
    x = 19,348.21

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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.