Home / 20,570.07-28,386.36-11,138.52

Finding the Fourth Proportional to 20,570.07, 28,386.36 and 11,138.52

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Solution

The fourth proportional to 20,570.07, 28,386.36 and 11,138.52 is: 15,370.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.07 : 28,386.36 = 11,138.52 : x
  2. Step 2: Convert to fraction form
    20,570.07/28,386.36 = 11,138.52/x
  3. Step 3: Cross multiply
    20,570.07x = 28,386.36 × 11,138.52
  4. Step 4: Simplify right side
    20,570.07x = 316,182,038.59
  5. Step 5: Solve for x
    x = 316,182,038.59/20,570.07
  6. Step 6: Final answer
    x = 15,370.98

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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.