Home / 31,697.76-47,547.18-11,985.60

Finding the Fourth Proportional to 31,697.76, 47,547.18 and 11,985.60

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Solution

The fourth proportional to 31,697.76, 47,547.18 and 11,985.60 is: 17,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,697.76 : 47,547.18 = 11,985.60 : x
  2. Step 2: Convert to fraction form
    31,697.76/47,547.18 = 11,985.60/x
  3. Step 3: Cross multiply
    31,697.76x = 47,547.18 × 11,985.60
  4. Step 4: Simplify right side
    31,697.76x = 569,881,480.61
  5. Step 5: Solve for x
    x = 569,881,480.61/31,697.76
  6. Step 6: Final answer
    x = 17,978.60

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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.