Home / 21,389.74-29,457.03-20,931.82

Finding the Fourth Proportional to 21,389.74, 29,457.03 and 20,931.82

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Solution

The fourth proportional to 21,389.74, 29,457.03 and 20,931.82 is: 28,826.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.74 : 29,457.03 = 20,931.82 : x
  2. Step 2: Convert to fraction form
    21,389.74/29,457.03 = 20,931.82/x
  3. Step 3: Cross multiply
    21,389.74x = 29,457.03 × 20,931.82
  4. Step 4: Simplify right side
    21,389.74x = 616,589,254.55
  5. Step 5: Solve for x
    x = 616,589,254.55/21,389.74
  6. Step 6: Final answer
    x = 28,826.41

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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.