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Finding the Fourth Proportional to 19,970.90, 29,938.93 and 7,487.58

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Solution

The fourth proportional to 19,970.90, 29,938.93 and 7,487.58 is: 11,224.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,970.90 : 29,938.93 = 7,487.58 : x
  2. Step 2: Convert to fraction form
    19,970.90/29,938.93 = 7,487.58/x
  3. Step 3: Cross multiply
    19,970.90x = 29,938.93 × 7,487.58
  4. Step 4: Simplify right side
    19,970.90x = 224,170,133.49
  5. Step 5: Solve for x
    x = 224,170,133.49/19,970.90
  6. Step 6: Final answer
    x = 11,224.84

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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.