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Finding the Fourth Proportional to 28,407.70, 42,623.70 and 17,885.80

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Solution

The fourth proportional to 28,407.70, 42,623.70 and 17,885.80 is: 26,836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.70 : 42,623.70 = 17,885.80 : x
  2. Step 2: Convert to fraction form
    28,407.70/42,623.70 = 17,885.80/x
  3. Step 3: Cross multiply
    28,407.70x = 42,623.70 × 17,885.80
  4. Step 4: Simplify right side
    28,407.70x = 762,358,973.46
  5. Step 5: Solve for x
    x = 762,358,973.46/28,407.70
  6. Step 6: Final answer
    x = 26,836.35

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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.