Home / 21,002.07-28,981.14-11,570.63

Finding the Fourth Proportional to 21,002.07, 28,981.14 and 11,570.63

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Solution

The fourth proportional to 21,002.07, 28,981.14 and 11,570.63 is: 15,966.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.07 : 28,981.14 = 11,570.63 : x
  2. Step 2: Convert to fraction form
    21,002.07/28,981.14 = 11,570.63/x
  3. Step 3: Cross multiply
    21,002.07x = 28,981.14 × 11,570.63
  4. Step 4: Simplify right side
    21,002.07x = 335,330,047.92
  5. Step 5: Solve for x
    x = 335,330,047.92/21,002.07
  6. Step 6: Final answer
    x = 15,966.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.