Home / 21,384.81-29,506.95-13,840.74

Finding the Fourth Proportional to 21,384.81, 29,506.95 and 13,840.74

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Solution

The fourth proportional to 21,384.81, 29,506.95 and 13,840.74 is: 19,097.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,384.81 : 29,506.95 = 13,840.74 : x
  2. Step 2: Convert to fraction form
    21,384.81/29,506.95 = 13,840.74/x
  3. Step 3: Cross multiply
    21,384.81x = 29,506.95 × 13,840.74
  4. Step 4: Simplify right side
    21,384.81x = 408,398,023.14
  5. Step 5: Solve for x
    x = 408,398,023.14/21,384.81
  6. Step 6: Final answer
    x = 19,097.58

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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.