Home / 12,989,539.02-17,925,598.74-7,188,720.78

Finding the Fourth Proportional to 12,989,539.02, 17,925,598.74 and 7,188,720.78

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Solution

The fourth proportional to 12,989,539.02, 17,925,598.74 and 7,188,720.78 is: 9,920,453.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989,539.02 : 17,925,598.74 = 7,188,720.78 : x
  2. Step 2: Convert to fraction form
    12,989,539.02/17,925,598.74 = 7,188,720.78/x
  3. Step 3: Cross multiply
    12,989,539.02x = 17,925,598.74 × 7,188,720.78
  4. Step 4: Simplify right side
    12,989,539.02x = 128,862,124,156,179.81
  5. Step 5: Solve for x
    x = 128,862,124,156,179.81/12,989,539.02
  6. Step 6: Final answer
    x = 9,920,453.99

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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.