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Finding the Fourth Proportional to 15,012.88, 20,703.94 and 13,820.50

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Solution

The fourth proportional to 15,012.88, 20,703.94 and 13,820.50 is: 19,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.88 : 20,703.94 = 13,820.50 : x
  2. Step 2: Convert to fraction form
    15,012.88/20,703.94 = 13,820.50/x
  3. Step 3: Cross multiply
    15,012.88x = 20,703.94 × 13,820.50
  4. Step 4: Simplify right side
    15,012.88x = 286,138,802.77
  5. Step 5: Solve for x
    x = 286,138,802.77/15,012.88
  6. Step 6: Final answer
    x = 19,059.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.