Home / 21,009.48-31,509.66-13,490.46

Finding the Fourth Proportional to 21,009.48, 31,509.66 and 13,490.46

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Solution

The fourth proportional to 21,009.48, 31,509.66 and 13,490.46 is: 20,232.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.48 : 31,509.66 = 13,490.46 : x
  2. Step 2: Convert to fraction form
    21,009.48/31,509.66 = 13,490.46/x
  3. Step 3: Cross multiply
    21,009.48x = 31,509.66 × 13,490.46
  4. Step 4: Simplify right side
    21,009.48x = 425,079,807.84
  5. Step 5: Solve for x
    x = 425,079,807.84/21,009.48
  6. Step 6: Final answer
    x = 20,232.76

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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.