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Finding the Fourth Proportional to 28,648.35, 42,973.08 and 9,929.00

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Solution

The fourth proportional to 28,648.35, 42,973.08 and 9,929.00 is: 14,893.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.35 : 42,973.08 = 9,929.00 : x
  2. Step 2: Convert to fraction form
    28,648.35/42,973.08 = 9,929.00/x
  3. Step 3: Cross multiply
    28,648.35x = 42,973.08 × 9,929.00
  4. Step 4: Simplify right side
    28,648.35x = 426,679,496.45
  5. Step 5: Solve for x
    x = 426,679,496.45/28,648.35
  6. Step 6: Final answer
    x = 14,893.68

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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.