Home / 42,970.20-64,455.29-13,390.41

Finding the Fourth Proportional to 42,970.20, 64,455.29 and 13,390.41

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Solution

The fourth proportional to 42,970.20, 64,455.29 and 13,390.41 is: 20,085.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,970.20 : 64,455.29 = 13,390.41 : x
  2. Step 2: Convert to fraction form
    42,970.20/64,455.29 = 13,390.41/x
  3. Step 3: Cross multiply
    42,970.20x = 64,455.29 × 13,390.41
  4. Step 4: Simplify right side
    42,970.20x = 863,083,060.06
  5. Step 5: Solve for x
    x = 863,083,060.06/42,970.20
  6. Step 6: Final answer
    x = 20,085.62

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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.