Home / 21,430.76-32,145.84-20,901.32

Finding the Fourth Proportional to 21,430.76, 32,145.84 and 20,901.32

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Solution

The fourth proportional to 21,430.76, 32,145.84 and 20,901.32 is: 31,351.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.76 : 32,145.84 = 20,901.32 : x
  2. Step 2: Convert to fraction form
    21,430.76/32,145.84 = 20,901.32/x
  3. Step 3: Cross multiply
    21,430.76x = 32,145.84 × 20,901.32
  4. Step 4: Simplify right side
    21,430.76x = 671,890,488.51
  5. Step 5: Solve for x
    x = 671,890,488.51/21,430.76
  6. Step 6: Final answer
    x = 31,351.69

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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.