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Finding the Fourth Proportional to 28,070.76, 38,737.65 and 15,495.51

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Solution

The fourth proportional to 28,070.76, 38,737.65 and 15,495.51 is: 21,383.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,070.76 : 38,737.65 = 15,495.51 : x
  2. Step 2: Convert to fraction form
    28,070.76/38,737.65 = 15,495.51/x
  3. Step 3: Cross multiply
    28,070.76x = 38,737.65 × 15,495.51
  4. Step 4: Simplify right side
    28,070.76x = 600,259,642.95
  5. Step 5: Solve for x
    x = 600,259,642.95/28,070.76
  6. Step 6: Final answer
    x = 21,383.80

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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.