Home / 30,963.36-42,730.02-18,395.40

Finding the Fourth Proportional to 30,963.36, 42,730.02 and 18,395.40

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Solution

The fourth proportional to 30,963.36, 42,730.02 and 18,395.40 is: 25,386.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963.36 : 42,730.02 = 18,395.40 : x
  2. Step 2: Convert to fraction form
    30,963.36/42,730.02 = 18,395.40/x
  3. Step 3: Cross multiply
    30,963.36x = 42,730.02 × 18,395.40
  4. Step 4: Simplify right side
    30,963.36x = 786,035,809.91
  5. Step 5: Solve for x
    x = 786,035,809.91/30,963.36
  6. Step 6: Final answer
    x = 25,386.00

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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.