Home / 42,705.20-64,057.80-13,123.10

Finding the Fourth Proportional to 42,705.20, 64,057.80 and 13,123.10

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Solution

The fourth proportional to 42,705.20, 64,057.80 and 13,123.10 is: 19,684.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,705.20 : 64,057.80 = 13,123.10 : x
  2. Step 2: Convert to fraction form
    42,705.20/64,057.80 = 13,123.10/x
  3. Step 3: Cross multiply
    42,705.20x = 64,057.80 × 13,123.10
  4. Step 4: Simplify right side
    42,705.20x = 840,636,915.18
  5. Step 5: Solve for x
    x = 840,636,915.18/42,705.20
  6. Step 6: Final answer
    x = 19,684.65

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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.