Home / 19,121.77-28,678.32-7,271.31

Finding the Fourth Proportional to 19,121.77, 28,678.32 and 7,271.31

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Solution

The fourth proportional to 19,121.77, 28,678.32 and 7,271.31 is: 10,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.77 : 28,678.32 = 7,271.31 : x
  2. Step 2: Convert to fraction form
    19,121.77/28,678.32 = 7,271.31/x
  3. Step 3: Cross multiply
    19,121.77x = 28,678.32 × 7,271.31
  4. Step 4: Simplify right side
    19,121.77x = 208,528,990.34
  5. Step 5: Solve for x
    x = 208,528,990.34/19,121.77
  6. Step 6: Final answer
    x = 10,905.32

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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.