Home / 21,030.12-31,545.18-11,802.60

Finding the Fourth Proportional to 21,030.12, 31,545.18 and 11,802.60

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Solution

The fourth proportional to 21,030.12, 31,545.18 and 11,802.60 is: 17,703.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.12 : 31,545.18 = 11,802.60 : x
  2. Step 2: Convert to fraction form
    21,030.12/31,545.18 = 11,802.60/x
  3. Step 3: Cross multiply
    21,030.12x = 31,545.18 × 11,802.60
  4. Step 4: Simplify right side
    21,030.12x = 372,315,141.47
  5. Step 5: Solve for x
    x = 372,315,141.47/21,030.12
  6. Step 6: Final answer
    x = 17,703.90

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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.