Home / 21,495.47-29,639.79-13,931.87

Finding the Fourth Proportional to 21,495.47, 29,639.79 and 13,931.87

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Solution

The fourth proportional to 21,495.47, 29,639.79 and 13,931.87 is: 19,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,495.47 : 29,639.79 = 13,931.87 : x
  2. Step 2: Convert to fraction form
    21,495.47/29,639.79 = 13,931.87/x
  3. Step 3: Cross multiply
    21,495.47x = 29,639.79 × 13,931.87
  4. Step 4: Simplify right side
    21,495.47x = 412,937,701.11
  5. Step 5: Solve for x
    x = 412,937,701.11/21,495.47
  6. Step 6: Final answer
    x = 19,210.45

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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.