Home / 39,281.76-58,931.52-12,989.28

Finding the Fourth Proportional to 39,281.76, 58,931.52 and 12,989.28

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Solution

The fourth proportional to 39,281.76, 58,931.52 and 12,989.28 is: 19,486.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,281.76 : 58,931.52 = 12,989.28 : x
  2. Step 2: Convert to fraction form
    39,281.76/58,931.52 = 12,989.28/x
  3. Step 3: Cross multiply
    39,281.76x = 58,931.52 × 12,989.28
  4. Step 4: Simplify right side
    39,281.76x = 765,478,014.11
  5. Step 5: Solve for x
    x = 765,478,014.11/39,281.76
  6. Step 6: Final answer
    x = 19,486.86

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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.