Home / 21,038.47-29,032.28-13,078.87

Finding the Fourth Proportional to 21,038.47, 29,032.28 and 13,078.87

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Solution

The fourth proportional to 21,038.47, 29,032.28 and 13,078.87 is: 18,048.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.47 : 29,032.28 = 13,078.87 : x
  2. Step 2: Convert to fraction form
    21,038.47/29,032.28 = 13,078.87/x
  3. Step 3: Cross multiply
    21,038.47x = 29,032.28 × 13,078.87
  4. Step 4: Simplify right side
    21,038.47x = 379,709,270.76
  5. Step 5: Solve for x
    x = 379,709,270.76/21,038.47
  6. Step 6: Final answer
    x = 18,048.34

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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.