Home / 39,138.56-58,688.32-12,840.32

Finding the Fourth Proportional to 39,138.56, 58,688.32 and 12,840.32

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Solution

The fourth proportional to 39,138.56, 58,688.32 and 12,840.32 is: 19,254.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.56 : 58,688.32 = 12,840.32 : x
  2. Step 2: Convert to fraction form
    39,138.56/58,688.32 = 12,840.32/x
  3. Step 3: Cross multiply
    39,138.56x = 58,688.32 × 12,840.32
  4. Step 4: Simplify right side
    39,138.56x = 753,576,809.06
  5. Step 5: Solve for x
    x = 753,576,809.06/39,138.56
  6. Step 6: Final answer
    x = 19,254.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.