Finding the Fourth Proportional to 21,808,261.79, 30,090,115.75 and 12,386,956.99
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Solution
The fourth proportional to 21,808,261.79, 30,090,115.75 and 12,386,956.99 is: 17,090,998.49
Step by Step Solution
- Step 1: Write the proportion equation
21,808,261.79 : 30,090,115.75 = 12,386,956.99 : x - Step 2: Convert to fraction form
21,808,261.79/30,090,115.75 = 12,386,956.99/x - Step 3: Cross multiply
21,808,261.79x = 30,090,115.75 × 12,386,956.99 - Step 4: Simplify right side
21,808,261.79x = 372,724,969,406,986.25 - Step 5: Solve for x
x = 372,724,969,406,986.25/21,808,261.79 - Step 6: Final answer
x = 17,090,998.49
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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.