Home / 31,456.90-47,187.96-13,688.16

Finding the Fourth Proportional to 31,456.90, 47,187.96 and 13,688.16

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Solution

The fourth proportional to 31,456.90, 47,187.96 and 13,688.16 is: 20,533.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,456.90 : 47,187.96 = 13,688.16 : x
  2. Step 2: Convert to fraction form
    31,456.90/47,187.96 = 13,688.16/x
  3. Step 3: Cross multiply
    31,456.90x = 47,187.96 × 13,688.16
  4. Step 4: Simplify right side
    31,456.90x = 645,916,346.55
  5. Step 5: Solve for x
    x = 645,916,346.55/31,456.90
  6. Step 6: Final answer
    x = 20,533.38

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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.