Home / 21,115,411.60-31,673,117.40-18,679,968.40

Finding the Fourth Proportional to 21,115,411.60, 31,673,117.40 and 18,679,968.40

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Solution

The fourth proportional to 21,115,411.60, 31,673,117.40 and 18,679,968.40 is: 28,019,952.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115,411.60 : 31,673,117.40 = 18,679,968.40 : x
  2. Step 2: Convert to fraction form
    21,115,411.60/31,673,117.40 = 18,679,968.40/x
  3. Step 3: Cross multiply
    21,115,411.60x = 31,673,117.40 × 18,679,968.40
  4. Step 4: Simplify right side
    21,115,411.60x = 591,652,832,161,490.12
  5. Step 5: Solve for x
    x = 591,652,832,161,490.12/21,115,411.60
  6. Step 6: Final answer
    x = 28,019,952.60

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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.