Home / 13,583.78-18,746.15-7,615.40

Finding the Fourth Proportional to 13,583.78, 18,746.15 and 7,615.40

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Solution

The fourth proportional to 13,583.78, 18,746.15 and 7,615.40 is: 10,509.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,583.78 : 18,746.15 = 7,615.40 : x
  2. Step 2: Convert to fraction form
    13,583.78/18,746.15 = 7,615.40/x
  3. Step 3: Cross multiply
    13,583.78x = 18,746.15 × 7,615.40
  4. Step 4: Simplify right side
    13,583.78x = 142,759,298.90
  5. Step 5: Solve for x
    x = 142,759,298.90/13,583.78
  6. Step 6: Final answer
    x = 10,509.55

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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.