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Finding the Fourth Proportional to 42,903.76, 64,355.70 and 17,930.15

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Solution

The fourth proportional to 42,903.76, 64,355.70 and 17,930.15 is: 26,895.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,903.76 : 64,355.70 = 17,930.15 : x
  2. Step 2: Convert to fraction form
    42,903.76/64,355.70 = 17,930.15/x
  3. Step 3: Cross multiply
    42,903.76x = 64,355.70 × 17,930.15
  4. Step 4: Simplify right side
    42,903.76x = 1,153,907,354.36
  5. Step 5: Solve for x
    x = 1,153,907,354.36/42,903.76
  6. Step 6: Final answer
    x = 26,895.25

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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.