Home / 15,235.54-21,030.81-13,639.30

Finding the Fourth Proportional to 15,235.54, 21,030.81 and 13,639.30

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Solution

The fourth proportional to 15,235.54, 21,030.81 and 13,639.30 is: 18,827.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,235.54 : 21,030.81 = 13,639.30 : x
  2. Step 2: Convert to fraction form
    15,235.54/21,030.81 = 13,639.30/x
  3. Step 3: Cross multiply
    15,235.54x = 21,030.81 × 13,639.30
  4. Step 4: Simplify right side
    15,235.54x = 286,845,423.11
  5. Step 5: Solve for x
    x = 286,845,423.11/15,235.54
  6. Step 6: Final answer
    x = 18,827.39

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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.